What if my iMac boots but turns black

I boot my imac and it turns black and the arrow comes up but does not allow me to use it? any thoughts?

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My iMac 17" screen turn black, any one able to provide solutions

My iMac 17" screen turn black when I relocation the computer, any one can provide solutions, thanks

Hello, Bernardneoh.
Thank you for visiting Apple Support Communities.
Here is a troubleshooting article that I would recommend going through when experiencing this issue.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Cheers,
Jason H.

My iMac screen suddenly turn black and white when I'm in fullscreen mode. What could be the cause of this problem?

Hi, once in a while the screen on my 5K imac turns black and white when I'm on youtube watching videos in fullscreen mode. It also exits the fullscreen mode automatically from one second to the next and a warning pops up saying how I can exit the fullscreen mode. Does anyone have an idea why this happens and if this is a software or hardware problem?

I'm using a Dell laptop with Windows 7. I've set the resolution to 1024x768, though the maximum resolution on this can go as high as 1366x768. So this is a problem that no one has been able to figure out? I've ran lots of other Flash-based applications that went fullscreen with no problem, so I'm wondering what other methods there are to try, if possible.

IMac boots to a black screen and shows blinking square cursor on top left

iMac boots to black screen and then shows flashing white square in the top left of the screen. After a few seconds an error message - i assume appears.
disc0s2 oxe0030005 undefined appears.
Does anyone know what this is?
Can view HDD using firewire
Can load diagnostic disc and run diagnostics with no errors

The disc0s2 should be your OS X boot volume. Have you tried starting from the Install DVD1? Start from the DVD and when you get to the OS X installer go to Disk Utility in the Utilities menu and select First Aid. Choose the top drive in the left hand column and repair. Repair as many times as necessary until no more repairs are reported. Quit Disk Utility. Then go to Startup Disk in the Utilities menu and choose the OS x volume on your Mac and restart.
Let us know what happens.

IMac screen suddenly turns black

iMac screen suddenly turns black

Suddenly shuts down, after few moments can be started and used again like normal. Started occurring when mouse and key board batteries where low ? coincidence-- batteries now changed but still happened once.

PLEASE HELP I am using an alienware m11x and the only problem i have is when i go to the bar on firefox 4 like the file,edit,etcc what every my mouse hovers over turns black and stays black :/

When my mouse hovers over the bar on firefox 4 it turns black so if i hover all of them all of them turn black and stay black and i cant see anything. Also I am using an alienware m11x with a dual core duo 2 Su700 (@1.3) (@1.3) with a 1g nvadia graphics card 335m geforce.

Make sure that you allow pages to choose their colors and that you haven't enabled High Contrast in the Accessibility settings.
*Firefox > Preferences > Content : Fonts & Colors > Colors : [X] "Allow pages to choose their own colors, instead of my selections above"
See also:
*http://kb.mozillazine.org/Images_or_animations_do_not_load
*https://support.mozilla.org/kb/Images+or+animations+do+not+show

Late 2009 27" iMac boots but screen stays black..what's the cause?

When I power up my mac (iMac11,1) I get the familiar "bong" sound and the fans and drives start to spin, but the screen remains black and unresponsive. If I turn the computer on and off often enough I get the screen to light, and once it's on all is good, but as soon as I do a shutdown I have to go through the same process of turning the machine on and off until the screen lights.... anyone know what the cause is? Someone mentioned it might be a logic board failure...if that's the case could I replace it? and if I can replace it can I put a more recent model board in my comp? seeing as they are like $800 a piece Any help is appreciated.
Thanks
Steve
27" i5 imac
12gig ram
OS X Lion

Thanks for the response BGreg
I ran the Apple hardware test and came up with the same error twice, error code: 4MOT/4/40000003:HDD-1313 The last four digits changed but everything else was the same.
According to some other msg boards this error code has something to do with the fan on the logic board and a possible connection to the hard drive overheating due to the dying fan... The fan sounds fine and I can't see how that relates to my black screen but at least it's something. My mac is out of warranty so I'm going to attempt opening it and cleaning and or replacing the fan myself, possibly the hdd as well, it's a lot cheaper that getting a mobo replacement lol $800-$1500, I keep extensive backups of my data so I'm not too worried. Thanks for your input, I'll let you know how the repairs go.
Cheers,
Steve

After startup my iMac's screen turns black

My iMac start ups normal. I hear the chime, followed by the apple logo and gears. Then the screen goes black but you can still see the cursor clear as day. I can also turn the brightness up and down, but it is still black. Is there anything I can do to fix it without taking it to the apple store 45 min away? Please help!!!

Will it start more normally if you choose to hold the Shift key down through startup and then you may be able to see the desktop and login...? This would be SafeBoot mode.
If so, then it could be troubleshooted or console utility logs looked into, to see if there is any evidence of system parts not loading properly, or of a hardware issue. Or a graphics problem after the system loads.
SafeBoot starts the computer in a reduced OS X so several items are turned off.
With an AppleCare plan in effect, you should consider making an appointment
with a Genius at the Apple Store, to take the computer in for diagnosis.
Especially if this repeats itself; that would make it easier to prove a point.
Have you used this computer with an external display?
In safeboot mode, if it starts you could check some other things in the system.
However there are keyboard shortcuts on startup that
may be able to troubleshoot past the problem.
•Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
•About reset the NVRAM (so you tried it, more than twice?)
http://support.apple.com/kb/HT1379
PS: there may be two things to try:
two workarounds:
Put the computer to sleep (close the lid on a Mac Book (pro) or press the power button quickly on a desktop Mac. After a few seconds of sleeping, wake the computer up again. The login dialog usually appears now.
2. Sometimes you do not want to put the computer to sleep because you do not want to interrupt a task that is running. In this case, press CTRL+SHIFT+EJECT. This keyboard shortcut usually locks the screen. In out case, locking the screen also enables or resets the screen saver, so that the next key press or mouse motion will bring up the login dialog.
Good luck & happy computing!

Had to reset password but now it won't go past the gray screen. It tries to boot but turns off. How do I fix it?

My father forgot his password on his macboo pro. I followed the instructions on how to reset it. Now when I turn it on it goes to the gray screen and there's a loading bar but it doesn''t finish, the mac turns off. What do I do!!!

Reinstall Lion, Mountain Lion, or Mavericks without erasing drive
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
Reinstall Mountain Lion or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

IMac screen issues-turns black then to log-in screen

I own a late 2102 iMac, 21.5 inch. 2.9GHz Intel Core i5 with 8GB memory. Storage=1 Terabyte. Running Yosemite 10.10.1. Several times in the past two months while I am using my iMac, my screen has become very bright, then suddenly switches to a black screen with just the cursor showing. It then switches to the user login screen. Today I was just syncing my iPhone 5S to iTunes. Nothing radical. In the past, I was using Word or sending an iMessage. Instead of logging back on as the same user, I opted to restart. When I restarted, iTunes opened back up as did PowerPoint, which was random since I hadn't been using PowerPoint nor was it even open in the Dock. I have restarted the iMac on several occasions using Command-R and ran Disk Utilities with no problems showing up. Has anyone else experienced the same or similar problem? Is it a Yosemite problem or a hardware problem? Any solutions?

1) You need to Find the crack on Sim 3 game on Google and Copy and replace the File with new crack and problem will get solved.
Try downclocking your >>GPU<<
try lowering it more and keep testing with each one. If you have another power supply test with that(but its HIGHLY unlikely that its your psu). But overclocked cards demand more power as far as i know and it might be getting tough for the psu to handle.
And is the space freeing up on only c drive? It happens all the time. temp files getting deleted and all that. but virus scan and chkdsk wouldnt hurt..................
Take pleasure in knowing that your problem is nothing compared to what most people i stated above are facing. they cant for more than ten minutes. your crash occurred only watch serials once and a after a long time right? see if it happens again. it might get more frequent in which case you problem is very .....problematic.

Help, new to Mac.. iMac boot but keyboard doesn't work...

Not sure what happened but the mac would now boot to ask for password. The keyboard does not respond. Act as if it not paired. I boot with the OS cd and the keyboard works fine. So I not it's not a hardware issue.
One more note, I put a usb keyboard, and when I type the user name, it appears the keyboard has been remapped.
Anyone seen this?
thx
Jerry

A bump up! Maybe someone will see it!
Also, try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk.
You could have some directory corruption. Let us know what errors Disk Utility reports and if DU was able to repair them. Cheers! DALE

Bondi Blue iMac 266 wont turn on at all.

OK, WELLLLLLL, i know you guys probably see this kind of thing everyday. i looked around the forum through all those "imac wont start" pages and none help. mine seems to be a different problem. ill try to give as much info as possible.
ok, i push the main power button, it chimes, HD spins up, everything seems just fine then click click click, and the whole thing goes off (no it doesnt boot up and monitor is just off, the whole thing goes off). if i remember correctly, the power light never turned green, and if it did it was for a short time. after it does this, pressing the power button does NOTHING, no noise at all.
i have 2 other identical macs so ive done a little experimenting (the other two work flawlessly) first i tried just swapping the computer out (not the board, the whole slide out thing, cdrom, hd logic board and all) that didnt work. while i had it out, i tried the computer part from the problem mac, in the other case (the one i knew worked) it worked, but when i installed some updates and restarted, it wouldnt come back on. it did the same as the other the power button did nothing, no noise whatsoever.
so im confused as ever. seems like both parts are broken haha, the crt part AND the computer.
blah, im gonna fiddle around with it a little more see what i can do.
any ideas??? (ALSO, it says 10.2 but honestly i have no idea what os this imac has, but im pretty sure its 9.1)
iMac G3 (CRT) 266 MHz / 512K Cache/32 MB/ 6GB HD/24x CD-ROM/ RAGE PRO / 6MB SGRAM/ modem Mac OS X (10.2.x) Bondi Blue/Green W/E it is haha

ok well just to clarify it a little bit, i just took the board out unhooked it all removed battery memory, etc (not cpu though), put it back in, plugged it back up, hit the power button. it chimes, hard drive spins up, the light is orange the whole time, then right as the light turns solid green i hear a click and the whole thing goes off and wont turn back on. also, i tested the battery and i think its dead. would a dead battery cause all of this????

When I turn on my iMac, it shows a black screen and says 'No bootable device - enter boot cd and press any key'. Not sure how to fix this.

When I turn on my iMac, it shows a black screen and says 'No bootable device - enter boot cd and press any key'.
I'm not sure what to do, I did not recieve a cd with my mac to boot it up (I ordered it online).
Also I can't find my harware serial number (I've tried many times to input what I thought it may be from my receipt). I saw that I need this number to contact apple support, my 90 day complimentary support is still valid so I wish to contact them.
I don't know much about apple products as this is my first apple computer so any information is helpful.

Hold down the Alt/Option-key at startup of your iMac to get the Boot Selection screen.
From that choose to boot into OSX.
Once in OSX go to System Preferences then Startup Volume and reset your OSX to be the default.
The new iMacs have OSX 10.7 Lion preinstalled and don't come with any CD/DVD anymore.
Instead OSX Lion includes a new feature called "Lion Recovery".
Have a read here About Lion Recovery
Stefan

IMac keep shutting down black screen then have to hold power button down then turn it on again i did this 4 times in all of a period of 5 minutes what to do ??

iMac keep shutting down black screen then have to hold power button down then turn it on again i did this 4 times in all of a period of 15 minutes what to do ??

Hmm. The problem still may be the RAM - Apple buys the RAM it puts in its machines from third-party vendors (usually Hynix) so it could be a RAM problem.
There are a couple of things that you can do yourself before taking your machine into an Apple Store or an AASP... download and run an application named Rember that will run a RAM test for you - let it run for a couple of hours or even overnight. If it turns out that your RAM is faulty, Rember will let you know. If it is faulty, then you have a couple of options - replace the RAM yourself or (particularly if you're under warranty still) take the machine to an Apple Store or AASP and have them replace the RAM.
If Rember finds no fault with the RAM, then you'll need to take it into an Apple Store/AASP and get a free diagnosis on the machine. Three beeps do usually indicate faulty RAM, but if it tests good with Rember you likely have another problem - it could be something as simple as the RAM, somehow, not seated correctly or signs of another hardware problem.
Run Rember first... call back with results.
Good luck,
Clinton

My iphone 4s screen has just turned black but it is still vibrating. I was reading other messages similar and it says to resart phone but holding the home and lock button. However my lock button doesnt work what should i do?

my iphone 4s screen has just turned black but it is still vibrating. I was reading other messages similar and it says to resart phone but holding the home and lock button. However my lock button doesnt work what should i do?

Is it the Home button that doesn't work, or the Power (Sleep/Wake) button? If the Power button works, you can switch it off. Not sure how you have been able to do anything without the Home button working?
Cheers,
GB

What if my iMac boots but turns black

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