Black screen before going to sleep

With the "dim screen..." option box UNCHECKED, instead of dimming the screen before putting the display to sleep, the screen turns black. The same kinda black as if you dim your backlight to 0.
So I can still see some windows etc... but the backlight is just not working.
This is very annoying cause it turns my screen to black after one minute when I am on the battery and it makes it impossible to read a text.
I believe this is a bug... what do you think, o you have the same problem?
PS: Of course my sleep setting is set to a much longer time (15 minutes) so it is not related to that.

Time stamp                Domain
Message
Duration
Delay
==========                ======
=======
========
=====
UUID: Dxxxxxxxx-xxxxx-xxxxx-xxxxxx-xxxxxxxxxx
7/6/13 11:02:32 PM GMT+0 Sleep
Software Sleep Sleep: Using AC (Charge:100%)
154 secs
7/6/13 11:02:32 PM GMT+0 Timedout
Kernel: Response from TracSrvWrapper timed out
30000 ms
7/6/13 11:02:33 PM GMT+0 SlowResponse
PMConnection: Response from mDNSResponder is slow (powercaps:0x0)
1191 ms
7/6/13 11:02:33 PM GMT+0 WakeRequests
Clients requested wake events: None
7/6/13 11:05:06 PM GMT+0 Wake
Wake due to EHC1/HID Activity: Using AC (Charge:100%)
653 secs
Sleep/Wakes since boot:4   Dark Wake Count in this sleep cycle:0
I used those command "pmset -g log" to get this log and found the problem.

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Just tried setting up bootcamp on MacPro. Computer now boots to white screen before going to black screen with curser in upper left corner. Can anyone get me back to Mac operating system so I can start over again?

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Hi there rjr25350,
You may find the information in the article below helpful.
Boot Camp: Windows installation boots to black screen with blinking cursor
http://support.apple.com/kb/TS4536
-Griff W.

TS1702 Downloaded Air Supremacy game app and only get company logo or black screen before iPad returns to home screen. Checked iPad and app up to date, no better. Any suggestions?

Downloaded Air Supremacy game app and only get company logo or a black screen before the app closes and goes back to my home screen. Checked that iPad and game are latest versions of software and restarted the iPad still with no luck. Any suggestions.

Have you tried a Reset...
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430

Dell Latitude E6510 Black screen before posting during cold boot

When I cold boot my laptop,I get about 10sec of black screen before the laptop posts..1st gen. i5 core,4gb DDR3 80GB Intel X25-M Nvidia NVS 3100 graphics with 512MB RAM.

I received a new XPS13 9343 last week and unpacked it yesterday (Friday 4/24/2015). When I first opened the lid and powered it up there was no display. It was completely black, not blank. I went to close the lid and when slightly jarring it I noticed that the initial screen appeared but briefly.
After analyzing the symptom I decided:
It is a physical issue - not firmware related
While I apply very slight pressure compressing the lower right corner of the display it will function
It is the LCD backlight that is intermittent as the image is perfect otherwise and turns on an off with pressure not quite instantaneously
Once the laptop warms (2 minutes) the display becomes completely reliable and unaffected by lid motion
My bet is that this is a problem with the conductive rubber mounting strip used to make the many connections to the LCD panel. Envision a very thin foam double sided tape with the characteristic that current can only flow front to back through the thin dimension of the tape. Adjacent pads (connection points) are not shorted by the tape and pads (carefully) aligned on the other side of the tape are connected. Its very ingenious actually.
In my case probably the circuit for the LCD backlight is at the end of a strip on the bottom right. It didn't properly bond during production. Probably once current flows through it (when I compress the display or hold the lid in just the right position) the adhesive warms and grabs hold. It probably doesn't take much to pass the low currents involved. I wonder if after some use or exposure to warmer operating conditions if it might not finally bond permanently and the issue go away?
Anyway this is what happens when you present an engineer with a problem, it gets over analyzed. You would like to think that within hours of posting this a bunch of production engineers will run over to all of the fixtures in their facilities that are used to assemble the displays and make sure there isn't one out of adjustment. Uneven clamping force or some such science.
The problem now for me is in finding out if I need to replace it and how much of a pain that is going to be. Unfortunately now I don't want to migrate from my prior laptop if I am going to have to send this one off someplace.
In some way this represents a security feature. Haha. I mean there is a trick to getting the thing to come up that I would only know. Another level of security at no extra charge. Still, one wishes to not have a quality concern floating in the back of your mind.
But, this might be your issue too. Anyone else have this experience?

Imac G4 15" Screen Stays Black After Screen Saver Goes To Sleep

I have an imac G4 15" that I just got from a friend that works pretty well, except that after it goes from the screen saver into to sleep mode, the screen stays black. I can hear the error chimes when I try to awaken the screen with the keys, but the screen just stays black. I have tried to increase the brightness, etc. but to no avail. Eventually I have to resort to re-booting and I am afraid that at some point, either the computer won't reboot or one of my external hard drives will crash. Any advice from someone who has experience with this issue would be greatly appreciated.
THANKS!

Hello and Welcome to Apple Discussions.
Have a look at this user tip:
http://discussions.apple.com/thread.jspa?messageID=4349704
cheers
mrtotes

Black screen after login / after sleep

Hoping somebody can help, I've spent like the last two days straight at the genius bar without success. When I boot up I see my profile and the guest, it boots as normal (not the delayed boot with black screen others have mentioned), but then I log in, see my desktop, icons, and then the screen goes black.
If I let it sleep for a few hours, when I wake it up the screen is also black and there's nothing I can do except hold the power till it shuts down.
In both cases I can tell the computer is still on because the backlit keyboard stays lit.
I've tried resetting nvram, smc, deleting the library cache file, doing a is reinstall without wipe, and I only have one partition/HD so it's definitely the default boot disc.
I can boot into safe mode, and occasionally boot up regularly after being in safe mode for a bit.
I had the display replaced due to a physical defect just before this happened, but I also got 10.10.3, which I know has caused graphics glitches for other people.
Hope you guys have some ideas! Thank you!

Mac users often ask whether they should install "anti-virus" (AV) software. The usual answer is "no." That answer is right, but it may give the wrong impression that there is no threat from what are loosely called "viruses." There is a threat, and you need to educate yourself about it.
1. This is a comment on what you should—and should not—do to protect yourself from malicious software ("malware") that circulates on the Internet and gets onto a computer as an unintended consequence of the user's actions.
It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the computer, or who has been able to take control of it remotely. That threat is in a different category, and there's no easy way to defend against it. AV software is not intended to, and does not, defend against such attacks.
The comment is long because the issue is complex. The key points are in sections 5, 6, and 10.
OS X now implements three layers of built-in protection specifically against malware, not counting runtime protections such as execute disable, sandboxing, system library randomization, and address space layout randomization that may also guard against other kinds of exploits.
2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user. Internally Apple calls it "XProtect."
The malware recognition database used by XProtect is automatically updated; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
The following caveats apply to XProtect:
☞ It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets.
☞ It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
As new versions of OS X are released, it's not clear whether Apple will indefinitely continue to maintain the XProtect database of older versions such as 10.6. The security of obsolete system versions may eventually be degraded. Security updates to the code of obsolete systems will stop being released at some point, and that may leave them open to other kinds of attack besides malware.
3. Starting with OS X 10.7.5, there has been a second layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't been checked for security by Apple unless it comes from the App Store, but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. That may not mean much if the developer lives in a country with a weak legal system (see below.)
Gatekeeper doesn't depend on a database of known malware. It has, however, the same limitations as XProtect, and in addition the following:
☞ It can easily be disabled or overridden by the user.
☞ A malware attacker could get control of a code-signing certificate under false pretenses, or could simply ignore the consequences of distributing codesigned malware.
☞ An App Store developer could find a way to bypass Apple's oversight, or the oversight could fail due to human error.
Apple has taken far too long to revoke the codesigning certificates of some known abusers, thereby diluting the value of Gatekeeper and the Developer ID program. Those lapses don't involve App Store products, however.
For the reasons given, App Store products, and—to a lesser extent—other applications recognized by Gatekeeper as signed, are safer than others, but they can't be considered absolutely safe. "Sandboxed" applications may prompt for access to private data, such as your contacts, or for access to the network. Think before granting that access. Sandbox security is based on user input. Never click through any request for authorization without thinking.
4. Starting with OS X 10.8.3, a third layer of protection has been added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update the OS. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) MRT also runs when you install or update the Apple-supplied Java runtime (but not the Oracle runtime.) Like XProtect, MRT is effective against known threats, but not against unknown ones. It notifies you if it finds malware, but otherwise there's no user interface to MRT.
5. The built-in security features of OS X reduce the risk of malware attack, but they are not, and never will be, complete protection. Malware is a problem of human behavior, not machine behavior, and no technological fix alone is going to solve it. Trusting software to protect you will only make you more vulnerable.
The best defense is always going to be your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "Trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and Internet criminals. If you're better informed than they think you are, you'll win. That means, in practice, that you always stay within a safe harbor of computing practices. How do you know when you're leaving the safe harbor? Below are some warning signs of danger.
Software from an untrustworthy source
☞ Software with a corporate brand, such as Adobe Flash Player, doesn't come directly from the developer’s website. Do not trust an alert from any website to update Flash, or your browser, or any other software. A genuine alert that Flash is outdated and blocked is shown on this support page. Follow the instructions on the support page in that case. Otherwise, assume that the alert is fake and someone is trying to scam you into installing malware. If you see such alerts on more than one website, ask for instructions.
☞ Software of any kind is distributed via BitTorrent, or Usenet, or on a website that also distributes pirated music or movies.
☞ Rogue websites such as Softonic, Soft32, and CNET Download distribute free applications that have been packaged in a superfluous "installer."
☞ The software is advertised by means of spam or intrusive web ads. Any ad, on any site, that includes a direct link to a download should be ignored.
Software that is plainly illegal or does something illegal
☞ High-priced commercial software such as Photoshop is "cracked" or "free."
☞ An application helps you to infringe copyright, for instance by circumventing the copy protection on commercial software, or saving streamed media for reuse without permission. All "YouTube downloaders" are in this category, though not all are necessarily malicious.
Conditional or unsolicited offers from strangers
☞ A telephone caller or a web page tells you that you have a “virus” and offers to help you remove it. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
☞ A web site offers free content such as video or music, but to use it you must install a “codec,” “plug-in,” "player," "downloader," "extractor," or “certificate” that comes from that same site, or an unknown one.
☞ You win a prize in a contest you never entered.
☞ Someone on a message board such as this one is eager to help you, but only if you download an application of his choosing.
☞ A "FREE WI-FI !!!" network advertises itself in a public place such as an airport, but is not provided by the management.
☞ Anything online that you would expect to pay for is "free."
Unexpected events
☞ A file is downloaded automatically when you visit a web page, with no other action on your part. Delete any such file without opening it.
☞ You open what you think is a document and get an alert that it's "an application downloaded from the Internet." Click Cancel and delete the file. Even if you don't get the alert, you should still delete any file that isn't what you expected it to be.
☞ An application does something you don't expect, such as asking for permission to access your contacts, your location, or the Internet for no obvious reason.
☞ Software is attached to email that you didn't request, even if it comes (or seems to come) from someone you trust.
I don't say that leaving the safe harbor just once will necessarily result in disaster, but making a habit of it will weaken your defenses against malware attack. Any of the above scenarios should, at the very least, make you uncomfortable.
6. Java on the Web (not to be confused with JavaScript, to which it's not related, despite the similarity of the names) is a weak point in the security of any system. Java is, among other things, a platform for running complex applications in a web page, on the client. That was always a bad idea, and Java's developers have proven themselves incapable of implementing it without also creating a portal for malware to enter. Past Java exploits are the closest thing there has ever been to a Windows-style virus affecting OS X. Merely loading a page with malicious Java content could be harmful.
Fortunately, client-side Java on the Web is obsolete and mostly extinct. Only a few outmoded sites still use it. Try to hasten the process of extinction by avoiding those sites, if you have a choice. Forget about playing games or other non-essential uses of Java.
Java is not included in OS X 10.7 and later. Discrete Java installers are distributed by Apple and by Oracle (the developer of Java.) Don't use either one unless you need it. Most people don't. If Java is installed, disable it—not JavaScript—in your browsers.
Regardless of version, experience has shown that Java on the Web can't be trusted. If you must use a Java applet for a task on a specific site, enable Java only for that site in Safari. Never enable Java for a public website that carries third-party advertising. Use it only on well-known, login-protected, secure websites without ads. In Safari 6 or later, you'll see a padlock icon in the address bar when visiting a secure site.
Stay within the safe harbor, and you’ll be as safe from malware as you can practically be. The rest of this comment concerns what you should not do to protect yourself.
7. Never install any commercial AV or "Internet security" products for the Mac, as they are all worse than useless. If you need to be able to detect Windows malware in your files, use one of the free security apps in the Mac App Store—nothing else.
Why shouldn't you use commercial AV products?
☞ To recognize malware, the software depends on a database of known threats, which is always at least a day out of date. This technique is a proven failure, as a major AV software vendor has admitted. Most attacks are "zero-day"—that is, previously unknown. Recognition-based AV does not defend against such attacks, and the enterprise IT industry is coming to the realization that traditional AV software is worthless.
☞ Its design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere. In order to meet that nonexistent threat, commercial AV software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
☞ By modifying the operating system, the software may also create weaknesses that could be exploited by malware attackers.
☞ Most importantly, a false sense of security is dangerous.
8. An AV product from the App Store, such as "ClamXav," has the same drawback as the commercial suites of being always out of date, but it does not inject low-level code into the operating system. That doesn't mean it's entirely harmless. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.
An AV app is not needed, and cannot be relied upon, for protection against OS X malware. It's useful, if at all, only for detecting Windows malware, and even for that use it's not really effective, because new Windows malware is emerging much faster than OS X malware.
Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else. A malicious attachment in email is usually easy to recognize by the name alone. An actual example:
London Terror Moovie.avi [124 spaces] Checked By Norton Antivirus.exe
You don't need software to tell you that's a Windows trojan. Software may be able to tell you which trojan it is, but who cares? In practice, there's no reason to use recognition software unless an organizational policy requires it. Windows malware is so widespread that you should assume it's in every email attachment until proven otherwise. Nevertheless, ClamXav or a similar product from the App Store may serve a purpose if it satisfies an ill-informed network administrator who says you must run some kind of AV application. It's free and it won't handicap the system.
The ClamXav developer won't try to "upsell" you to a paid version of the product. Other developers may do that. Don't be upsold. For one thing, you should not pay to protect Windows users from the consequences of their choice of computing platform. For another, a paid upgrade from a free app will probably have all the disadvantages mentioned in section 7.
9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use in the Sharing preference pane. All are disabled by default.
10. As a Mac user, you don't have to live in fear that your computer may be infected every time you install software, read email, or visit a web page. But neither can you assume that you will always be safe from exploitation, no matter what you do. Navigating the Internet is like walking the streets of a big city. It can be as safe or as dangerous as you choose to make it. The greatest harm done by security software is precisely its selling point: it makes people feel safe. They may then feel safe enough to take risks from which the software doesn't protect them. Nothing can lessen the need for safe computing practices.

Sat A665 - S6092 black screen before windows startup

I got a problem, it is strange. Sometimes windows starts and sometimes it doesnt. I normally press the power button, then it appear toshiba logo, then it appears a little line blinking at the top of the black screen and then it goes completely black, nothing happens. If I press ctrl + alt + del it reboots, but it I press the power button it turns off roughly. Sometimes I reboot 2 times and windows starts, sometimes 10 times and it starts, and sometimes it starts normally. What can I do? Thank you

I have the same problem with my Sat665d for about 1mth. Finally it got worse and worse. Problem is that your hard drive is failing and that you should back up your files asap while you still can. Toshiba is replacing my hard drive. I'm packing my laptop in the box they sent me. It's all prepaid shipping etc. Fed ex is picking it up in the morning. My laptop was under the 1yr manufactures warranty. So i hope yours is under warranty,otherwise you have to pay for new hard drive. They are relatively cheap about $60.00 -$100.00 depending how big it is. I hope this helps you before it's to late.

Sudden black screen and goes dead

I had a similar version of this problem 2 days ago but after lots of button pushing, etc. it started working again but the problem has returned.
My PowerBook suddenly, without warning, flicks to a black screen and the motor shuts down immediately. There's no winding down in sound, it simply stops on a dime. The only way to get it running again is to reset the power manager. I get it up and running for a few minutes and then again, without warning, goes black and dead at the same time. Also, if I get it up and running for a few minutes and shut the lid, when I open it again the screen looks normal but within 15-20 it does the black dead thing.
I've reset the power manager. I've run a repair permissions with the CD and utility disk. I've also repaired disk using the CD and utility disk. I did a hardware check. All of these have never said there was a problem in the first place. I've reset the PRAM.
Are there any other suggestions? I need this laptop for a swim banquet this Sunday.
I dread the thought of doing a clean install. The last time I did that it took me all day to get things back to normal. Would a clean install help in this situation? Could someone get me the steps to do the easiest install.....I think I must have clicked the wrong way before and that is why it took a long time to get things back to normal.
Thanks so much in advance.

I have posted this question under Powerbook and with no responses at all. I saw where a similar question to this was asked on this forum before with several people helping that maybe I would have more luck here.
I appreciate any and all help. You guys are wonderful.
I've taken out the battery but can't find where the air port card is located.
When my husband gets home I'm going to ask him to open it up to make sure the memory is firmly in place.
Does anyone know anything else I can try?

Black screen on resume from sleep using open source AMD/ATI driver

When waking from sleep using systemctl suspend or pm-suspend , I am presented with a black screen. I can still open programs, type, etc. but cannot see what I am doing. I usually just wind up rebooting from whatever terminal I had open, but again I can't see what I am typing. Upon reboot, the screen starts back up again. Everything else seems to resume from sleep just fine, it's just the screen that won't turn back on.
I came from Ubuntu and had this same problem there. However, I only had this problem when using the open source xf86-video driver; when using the proprietary drivers, I was able to suspend/resume just fine. So it seems this problem is specific to the open source drivers.
If I'm using an external monitor, my external monitor will resume just fine after waking from sleep, but the laptop screen will not.
Googling around shows this is a common problem with AMD/ATI cards, and after a lot of attempts and failures I'm interested in knowing if anyone else has solved this problem.
What I've tried so far (without success):
-various quirks included with pm-utils to turn on dpms after resume
-xrandr after resumption from sleep
==xrandr --output LVDS --off (If used without suspending (so while the screen still works) this seems to crash Gnome the first time around, but Gnome automatically restarts. If used a second time, it completely blanks the screen and requires a reboot)
==xrandr --output LVDS --mode 1600x900
-xset dpms force on or xset dpms force off after resumption from sleep
-vbetool dpms off and vbetool dpms on results in error message "Real mode call failed"
-scripts using vbetool or xrandr when resuming from sleep
-switching between virtual consoles and gnome using alt-ctrl-fn-f1 and alt-ctrl-fn-f2 keys
My setup:
-HP Envy dv7
-UEFI dual-boot with Windows 8
-AMD Radeon HD 7640G
-xf86-video-ati 1:7.2.0-1 driver
-Gnome DE using GDM login manager
Thank you.
EDIT: I did try using the proprietary drivers for a time, but found I couldn't adjust my brightness. At first I thought working suspension > adjustable brightness, but I quickly changed my mind after one night of trying to work on an unadjustable maximally bright screen.
Last edited by broahmed (2013-11-23 02:18:57)

Unfortunately I could not fix the problem so I wiped my system and loaded all new drivers before I found this posting.
Is there a way to get the old ATI driver that works? The only one available on the ATI and Lenovo website is the latest one with the problem. I agree with you David, Lenovo should have fixed this problem already with ATI.
John

Black Screen, Unable to enter sleep...

Well, I read and reread as many of these topics that I can..
So, here's my problem.
I was watching a DVD on my 600mhz iBook last night and then for the first time.. EVERYTHING FROZE. I hit the kill switch and restarted to a black screen. The Apple on the back does not light up, nor does closing the lid cause me to enter sleep mode. I called Apple and as I expected I'm out of warranty and for the logic board repair program I would have to pay nearly $300. Before I do that (and order a new iBook - I'm ready for a new one anyway) I wanted to throw this out there and get some opinions.
Does this sound like the logic board?
Thanks.
Robert

Try starting up in Safe Mode. This will take awhile longer than a normal startup because it does a file check and repair of the hard disk. If it CAN be corrected, maybe this will do it.
It does sound like you may have a logic board problem on your hands.

Black screen upon wake from sleep when I change power state while in sleep

Hi,
I'm having this problem where my MacbookPro won't always wake from sleep.
OSX is 10.6.3 and fully updated.
I've done a lot of troubleshooting, and I can now replicate the issue 100%:
1 - Put the MacbookPro to sleep by closing lid
2 - Change power source (from plugged-in to battery or vice versa)
3 - open lid - MacbookPro will wake, but stays at black screen and is unresponsive.
Only if I change power state while sleeping will this issue show. Anyone else experincing this issue, and anygot got a clue on what to do?
regards,
Lasse

I've seen the same issue after upgrading to 10.6.3. I have a one year old MacBook Pro. I would have the screen be black after coming back from sleep or hibernate (tried both).
The workaround I found is to close the lid -almost- all the way and then immediately open it back up again, like I am catching the Mac going back to sleep and then changing my mind. For whatever reason, this has been reliably solving my issue for the last couple weeks reliably.
Only other oddity I noticed is that immediately after upgrading OS X told me that my one year old battery needed to go in for servicing...
Anyway, now all looks right with the world assuming you don't mind a quick close/open cycle.. Lovely...
Tim

Updated to windows 10 and now my computer stays black when it goes into sleep mode

I just updated my computer to windows 10. Whenever it goes into sleep mode and i try to move the mouse it just stays black and i have to turn my computer off and then on again. after that it finally works but its just annoying. I already tried updating my card driver, but it said it was already up to date.

My iMac i7 quad was having the same symptoms with the blue screen and long startup times a couple of months ago. Apple Care told me to bring it in to the local Apple Store, and after some diagnostics, the hard drive required replacing. It took one day to replace the hard drive and my iMac is running great. I only had the iMac for about 12 months when the drive needed to be replaced. Not sure if that is your Mac's problem, but it was for mine.

Black screen upon waking from sleep

Hello,
I have an intermittent problem with waking my entry-level MBP from sleep; on some occasions, the screen remains black instead of the system waking up and displaying the Finder.
Recently, upon waking from sleep, the authentication dialog displayed, I typed my password and pressed return, the dialog dismissed, the screen remained black, and the wait cursor displayed without spinning.
To recover, I needed to force power down and cold reboot.
system.log (in Console) contained the following entry at the time of the crash.
Aug 14 07:39:51 BF-H-MBP kernel[0]: NVChannel(GL): Graphics channel exception! status = 0xffff info32 = 0xd = GR: SW Notify ErrorAug 14 07:39:51 BF-H-MBP kernel[0]: NVChannel(GL): Graphics channel exception! status = 0xffff info32 = 0xd = GR: SW Notify Error
The entries surrounding the one above were as follows (the next to last one evidently was the final entry before the forced power down).
Aug 14 07:39:47 BF-H-MBP kernel[0]: IOBluetoothHCIController::restartShutdownWL this is a wake from sleep
Aug 14 07:39:47 BF-H-MBP kernel[0]: System Wake
Aug 14 07:39:47 BF-H-MBP kernel[0]: IOUSBWorkLoop::closeGate - interrupt Thread being held off
Aug 14 07:39:51 BF-H-MBP kernel[0]: NVChannel(GL): Graphics channel exception! status = 0xffff info32 = 0xd = GR: SW Notify Error
Aug 14 07:39:51 BF-H-MBP BatteryUpdater[3590]: Battery does not need the BatteryUpdate v 1.2 (0x2)
Aug 14 07:39:51 BF-H-MBP lookupd[3588]: lookupd (version 369.6) starting - Tue Aug 14 07:39:51 2007
Aug 14 07:50:08 localhost kernel[0]: hi mem tramps at 0xffe00000
Can someone diagnose the problem based upon the above Console entries?
Thanks in advance!

Hi,
Thanks for taking time to post.
My question is different than the one your posting answers.
My question is, what is the diagnosis of the problem based upon the Console log entries that I've posted (rather than "How do I recover from the black screen?")?
Cheers!

Black Screen before installing windows 7. Lets solve once and for all.

I have a late 2008 macbook pro and have been trying to install windows 7 through boot camp for a number of days now. I have read every forum on the internet and have tried every popular solution (i.e. resetting pram, smc, unplugging, changing screen resolution, etc.) and nothing has worked. I know there are many other people with this problem but none of them have solutions. I had windows 7 installed a few months ago but it stopped working and I had to delete it. Just yesterday I reinstalled Snow Leopard and still nothing. I created the partition and tried to install windows but it just goes to the blinking cursor for one second, then a black screen. I have tried everything possible and nothing works.
Please lets try to get this problem solved because out of every single forum on the internet, none of them have solved this problem.

I think after weeks of searching I have finally narrowed it down, based on what I have read, to a disk drive problem. It seems to be something wrong with the EFI or the entire disk drive in general. I am taking it to the apple store tomorrow and I highly doubt they will do anything.

Black screen before Windows installation

I have already installed Windows 7 before and I had no problems with the installation. The reason why I decided to reinstall Windows is when I was trying to start BootCamp I only got black screen. This started to happen after I did hard reboot. I did this because Windows freezed.
I deleted Windows on my MacBook and then I tried to install Windows again. After BootCamp Assistant splited hard drive (1st part for Mac OS X, 2nd part for Windows) OS X shutted down and after that I heard Mac sound (sound when You start Mac). And then I can only see black screen ( also there was a console cursor for a second ).
Why black screen started to happen?
and
How can I avoid it?

Solution may be found if you search in the "More Like This" section over in the right column.

Black screen before going to sleep

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