Monitor not turning on

When I turn my new Mac Pro on the Apple 27" display doesn't turn on. I have to unplug the monitor and plug it back in for it to be recognized. The keyboard also isn’t recognized at startup. I have to unplug and plug that back in to work as well. I did the update that said it fixed lower power USB problems. It didn’t help me. Has anyone else had this problem and found a way to fix it?

Hi,
I solved the problem. The chimes/engaged tone meant the RAM wasn't in place. I opened up the RAM compartment, took the RAM out, blew on it, put it back in again, screwed the compartment back on again and now the computer works fine. Note, I did all this with the laptop unplugged and the battery ejected. My laptop must have received a heavy knock that put the RAM out of position. Look at some youtube videos on how to replace RAM on Powerbooks, the same process as reseating it, in order to do it safely.
Leao

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HP w2338h monitor not turning on!!!

my HP w2338h monitor is not turning on. My computer is on, blue power button, screeching noise, the whole enchilada. I shook the mouse, clicked aimlessly, then tapped the space bar until the speakers told me to stop. I pressed the power button on the screen. It turned on, and said "monitor going to sleep". Then shut off again. Because the screen was off, Sadly, I had to turn it off with the button on top of the computer ( If you don't know, that is extremely bad for the computer). It didn't turn off. I haven't tried turning the power strip off, and I don't want to, but it seems like my only option.
If it helps, I have an HP Pavilion p6387c, product number #VT650AA#ABA, and an HP w2338h monitor.
PLEASE HELP
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Hello Herobrine13922,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that you are getting "Monitor going to sleep" message when you turn your computer on. I would like you to hard reset your entire computer by unplugging it from the power bar and from the back of both the computer and the monitor. Then hold the power button on the computer down for 30 seconds. When you are done that do the same for the monitor. Once this is complete plug them back in and start up your computer.
Please re-post if you still require additional support. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

Client Monitors Not Turning Off at Login Screen

I manage a video production system with 16 Mac Pros and 4 Xserves all on an XSan System. I use Workgroup Manager to handle Access and other stuff. Starting two months ago, The computer monitors on all Mac Pros will not go to sleep when they are on the login screen. The monitors are supposed to turn off after 30 minutes when no one is on the computer. I have tried everything I can think of. I have set this in Workgroup Manager for the computers individually and the computer group they are apart of; the local admin on each client; and even in the client root account using Unix commands from Remote Desktop. Still the monitors are allways on if the login screen is showing. If a client is logged in, the monitors shut off correctly after 30 minutes of idle time.

Many Open Directory problems can be resolved by taking the following steps. Test after each one, and back up all data before making any changes.
1. The OD master must have a static IP address on the local network, not a dynamic address.
2. You must have a working DNS service, and the master's hostname must match its fully-qualified domain name. To confirm, select the server by name in the sidebar of the Server application window, then select the Overview tab. Click the Edit button on the Host Name line. On the Accessing your Server sheet, Domain Name should be selected. Change the Host Name, if necessary. The server must have at least a three-level name (e.g. "server.yourdomain.com"), and the name must not be in the ".local" top-level domain, which is reserved for Bonjour.
3. The primary DNS server used by the master must be 127.0.0.1 (that is, itself) unless you're using another server for internal DNS. The only DNS server set on the clients should be the internal one, which they should get from DHCP if applicable.
4. Follow these instructions to rebuild the Kerberos configuration on the master.
5. If you use authenticated binding, check the validity of the master's certificate. The common name must match the hostname and domain name. Deselecting and then reselecting the certificate in Server.app has been reported to have an effect in some cases.
6. Unbind and then rebind the clients in the Users & Groups preference pane. Use the fully-qualified domain name of the master.
7. Reboot the master and the clients.
8. Don't log in to the server with a network user's account.
9. As a last resort, export all OD users. In the Open Directory pane of Server, delete the OD server. Then recreate it and import the users. Ensure that the UID's are in the 1001+ range.

Can a broken Display Switch module cause my screen to not turn on or be recognized?

Hi All,
I have recently been having some issues with my LCD screen in my HP Pavillion dv9700. Ever since I replaced the left hinge on my notebook, I have had to fiddle with my screen by closing and opening it during booting to get it to turn on. This only happened when booting into linux. When booting into vista, the screen would turn on without a problem. This morning I was so fed up with this, that I thought maybe some switch was not getting pressed to tell the notebook that the lid was opened. After looking at all the cables and putting everything back together, my screen now no longer turns on no matter how much I open and close the lid. It wont even turn on in vista. I am however able to connect a vga cable to my notebook and use an external monitor without any problems. I opened up the nvidia control panel in both windows and linux and it does not recognize my notebook monitor, only the external monitor shows up. Could this be caused by a broken display switch module? How can I diagnose this problem? Is there a way to bypass the display switch module by jumping two wires?
Any ideas are appreciated,
Thanks in advance
OS: Latest version of Ubuntu Linux 11.10 dual booting with Windows Vista
Problem: LCD Monitor not turning on / being recognized
possible cause: LCD Display Switch Module

Update:
I just figured out that it cant be my display switch module because when i close the lid to my notebook, the external monitor shuts off and the computer goes into standby mode. I now think this might be an issue with the ribbon cable. Is there anything else which might be causing this problem which I am overlooking?

T520: Monitor does not turn on after boot or waking from sleep

I have a pretty standard T520, the only modifications are upgrading to a larger battery and higher screen resolution (1600x1200), and am currently running windows 7 64bit. Whenever I turn on the machine from a powered off state, or if I try and wake it up from being asleep, 2/3 of the time the monitor will fail to turn on. I am only able to remedy this by closing the lid, letting it go to sleep again, opening it again, holding down the fn key (if that even helps), and hoping it turns on the next time. On a fresh boot, the screen backlight is on, but there is never anything displayed on the monitor, so I cannot even go in to the BIOS. To get to the BIOS, I have to boot normally, repeatedly open/close the monitor until it displays something, reboot, and hope the monitor is still working after the reboot.
The forum posts I have seen on this topic seem to only relate to this problem with external monitors; however, this is occuring with the laptop monitor itself.
Has anyone else had this issue, or know of ways to correct it?

One other note: I am not hearing the hard drive start spinning on the times that the monitor does not turn on when returning from hibernate. When the monitor does turn on, there is the distinct sound of the hard drive starting up, and I can feel a bit of torque within the laptop from the hdd.

Monitor will not turn on

After years of good service, my monitor will not turn on when I turn on the MacPro.

I am sorry to hear that.
Tell us some model numbers for your display, your display card, which Mac Pro, and stuff like that and Readers would love to speculate on what the most likely problem (and maybe even solutions) might be.

Backlight of the LCD monitor is not turning o

For some strange reason, my Zen Micro, which was working perfectly until today, ran into a big problem. The backlight for the LCD monitor does not turn off, even when I shut it down. The backlight remains on until I remove the battery. I tried to adjust the settings and even re-format my zen mirco, but it is still having the same problem. Please help! Thanks.

Yes, I have tried everything from resetting to reformating and still the problem remians. I don't know what could have happened to it. It was working perfectly until this somehow happened. Has anyone else recieved this problem? Thanks.

Up-Dated to 10.9.3 and now my 30 inch monitor does not turn on

I just up dated to 10.9.3 and now my 30 inch monitor does not turn on, only my 24 inch one does. But if I disconnect my 24 icy one, then my 30 inch works. this was not happening on 10.9.2. what is wrong?

My problem is fixed. I phoned Apple and they put me thorugh to an engeneer and he epxlained to me how to re-set the PRAM and I did and it worked. Both my monitors are up and running again.
Shut down the computer, when you start it up again after the start up sound press at the same time the ALT, COMMAND, P and R buttons until you hear the Mac start up sound again.
It worked.
Thanks again Apple and omit.
Antonio

When I close my laptop lid and it goes to sleep so that I can use an external monitor, monitor does not turn on when I hit a key to start laptop

When I use my external monitor, I cannot get it to work after awakening my laptop using any key. My monitor won't light up although laptop keyboard is backlit showing that it has come out of sleep mode. Why does the monitor not get the signal from the laptop?

I still cannot figure out why it doesn't always work. All parameters were met and my bluetooth keyboard is set correctly to wake the computer. My keyboard becomes backlit, but my LG monitor does not pick up a video signal and is black and my laptop monitor is off. The only way I can get out is to hold on button on laptop until it shuts down and I can start up again. This happens on an intermittent basis. Sometimes it works and other times I get black screens. I need to know if I can use command F1 to get the laptop to detect the display or is their another key combination to send the signal to the external monitor when I can't see anything because I hate to do a hard shut down to get out of this mode! Please advise!

I have a late 2013 15inch retina. The screen randomly turns black. There is no error message. It will not turn on until I close it and reopen it. It returns to the page I was on as if nothing had happened.

monitor randomly turns off to black screen

I would reset the SMC. If that does not help, take it in for testing.
Barry

Backlight does not turn on anymore Satellite M70-147

Hello outhere,
The backlight of my M-series M70-147 does not turn on anymore.
I first noticed this when awakening the laptop from standby or hibernation mode.
At first I thought the screen was not working anymore, but when I looked closely I could still make out the icons on the desktop vaguely. So at first I rebooted the laptop and then most of the times the backlight would turn on and stay on.
But now it does not do that anymore, not even when I close the screen (to force standby mode) and then open it again, the backlight won't turn on.
I also looked at other forums and topics what the cause might be, a broken backlight or a faulty power inverter.
So can anybody with the symptons described tell me what the cause might be?
I'm pretty sure nothing is wrong with the graphics card because when I hooked on my laptop to my dads LCD monitor it just displayed the desktop of my laptop on the LCD monitor. Also the first time I did this after pressing Fn-F5 a few times the screen of my laptop would come on some times. But now it does not do that anymore.
So can anybody with the symptons described tell me what the cause might be?
Many thanks.

> So can anybody with the symptons described tell me what the cause might be?
For me it looks like a faulty FL inverter.
The FL inverter is a small part behind the display frame and it controls the backlight.
Usually the external display should work properly because the FL inverter affects the internal display only...
However, the issue can be solved only by replacement of this part.
I recommend contacting the Toshiba ASP in your country to get this part replaced

Slimline s3321p display does not turn on after sleep (Win 7)

Upgraded from Vista 32 bit system to Win 7 32 bit because of lots of Vista issues. Win 7 resolved most problems but then recently, after a couple of months, display would not turn on following sleep or hibernation. Couldn't fix so did clean install of win 7 64 bit (custom instead of update) to resolve the problem. But same thing in Win 7 64. Installed the multiple MS updates. MS''s Nvidia display driver install always failed and a couple others I downloaded elsewhere failed as well. Did finally get a recent driver from nvidia's website that installed (9.18.13.697), but it didn't solve the problem. Ran the same as the older driver.
Also tried the following:
-all kinds of power setting changes
-different monitor (flatscreen TV is the normal one I use because this is my dvr/media machine)
-different RGB cable
-ran win 7 install disk to fix any OS problems
-inactivating hibernate
-checking voltage output of all power supply leads following instructions (all within normal tolerance)
-reconnecting all motherboard leads
-swapping around the two 2GB memory modules
-various system checks
-tried to install various Vista 64 bit fixes/updates from HP website, but they don't install ("don't meet minimum requirements")
-and more things I can't remember
HP doesn't seem to have any Win 7 support for this computer, so now I'm at a loss. At the moment I'm leaving the machine on all the time, but don't want to do this forever. I suppose it could be a faulty motherboard, but short of replacement, anything else to try?

Hi,
A couple of suggestions:
Check you have the latest BIOS update - 5.18 - search for sp40834.exe - often these updates improve these functions
If you are game, try just one RAM stick installed as a test, try slot 0 and 1
Lastly, try a different video cable - It's a long shot, but it could be key to the issue
Hope that these suggestions assist
regards davida
"Although I am an HP employee, I am speaking for myself and not for HP"

IMac G5 does not turn on after power cord knocked off

I have an iMac G5 that I recently passed on to my daughter. For the past few years it has been working fine except for one occasion that I replaced the power supply. At that time it was still covered by warranty and Apple sent me a replacement unit that I installed myself. Lately, the power cord was knocked off while the computer was on and now it will not turn on completely. It starts for about 15 seconds up to the gray Apple logo then the screen goes blank. I monitored the LEDs and all 3 do turn on then the computer shuts down. At first I thought it's the power supply that was affected with the power cord accident, and bought a replacement unit. I have just installed it but still the same problem exist. I am now asking for help from the expert souls out there to save this computer. Thanks.

No more ideas except to try starting from the install disc and see if that works. Resetting the PRAM might jolt it back to life, it's worth a try, but I am not hopeful.
If you do take it in, please let us know whether it was the logic board...

Screen does not turn on sometimes

hi everyone,
i recently got a t61 and am having a weird screen problem. sometimes when the screen turns off because a) the laptop is idle b) the lid is closed or c) the laptop goes into standby, it does not turn back on. meaning, when i try to wake the laptop up, the screen remains dark. actually, i can see stuff, but its very very very dark, barely visible. the machine is definitely not frozen, it still makes sounds, etc, when i click stuff. sometimes when i close the lid and open (once or a few times) the monitor comes back to normal. sometimes i have to reboot to get it to come back! it doesn't happen all the time, but it's pretty **bleep** annoying. i have checked to make sure i have the latest drivers, reinstalled to factory preset, run pc doctor, an so far haven't been able to figure this out. any suggestions would be much appreciated! btw, how can i figure out which warranty i got? i can't quite remember :-/
thanks,
- boris
edit: a few more details from my order
43Y3426   SBB INTEL CORE2DUO PROC.T9300
46P4166   VBB MICROSOFT WINXP PROFESSION
42V9437   SBB MSWIN XP PROF US ENGLISH
42X5980   SBB INTEL GMA X3100 GM965
41W2060   VBB 1GB PC2-5300 667MHZ 1DIMM
42V8195   SBB KEYBOARD US ENGLISH
42V9329   SBB UN(TRACKPOINT+TCHPD)
42X5219   SBB 160GB HDD,7200RPM
42V8714   SBB CD-RW/DVD-ROM COM,UBAYSLIM
42X0805   VBB PC CARDSLOT EX CARDSLOT
41W1685   SBB 11ABGWIFI WL LAN USEULAANZ
62P6054   VBB INTEGR.BLUETOOTH PAN
42V9338   SBB 6 CELL LI-ION BATERRY
41W1787   SBB CPK NORTH AMERICA
42V9354   SBB LANG. PACK US ENGLISH
1 CAFEE06   RECYCLE FEE FOR PRODUCT WITH 4 TO 14 INCH DISPLAY
also, i've plugged in an external monitor without any problems, so i actually don't think its a software bug... although who knows
Message Edited by bbabenko on 03-24-2008 10:10 PM
Message Edited by bbabenko on 03-24-2008 10:13 PM
Message Edited by bbabenko on 03-24-2008 10:14 PM

quick update: i tried the following hotfix from ms http://support.microsoft.com/kb/917332/en-us , but the problem remains... nevertheless, i guess i was wrong, i guess it's quite possible this is a windows xp problem... grrrrr

MacBook Pro Will Not Turn On. Charger light flashing

Hi there all. I am having a problem with my late 2011 MacBook Pro, and I have tried everything. I was wondering if you might be able to help. I will describe the problem in detail:
This morning when I woke up and went to use my macbook, it said the battery was 50%, even though it was plugged in. I use it like a desktop, plugged in to a monitor and plugged in to power most of the time. I usually allow it to drain the battery every few days. Anyway, I rebooted it, and the battery was still going down. I tried various things, like unplugging it completely etc. I remembered that my friend had this problem last year, with her exact same model macbook, and she came to me, and I was able to fix it. So, I thought if I followed all those steps I would be fine. I reset the SMC and PRAM. At this point the battery was showing at 0% when the OS (mavericks) loaded, and then after a few minutes the computer switched itself off completely and with no warning. The light on the charger was sometimes showing orange but didn't appear to be charging after several hours. The battery indicator was flashing 3 times on the first light then fading. It was not turning on at all now.
So, I decided to do what I did to my friend's macbook to fix it. I unscrewed and removed the back cover, then i carefully unplugged to battery from the motherboard, and left it unplugged for about 20 mins. I also pressed the power button for 5 seconds while it was unplugged. I then plugged it back in, and made sure the plug was correctly seated, put the cover back on, and plugged in the adaptor. to my horror, this did not fix the problem, as it did with friend's MB. Now the light on the charger was flashing from green to orange, and there was a sound like a hard drive spinning, also the status light on the front of the computer was flashing white. So, I opened it up again and plugged in the power adapter to see what it was. Actually, it is the fan. Whenever the light in charger is orange, the fan spins, then when it turns green, the fan stops! This is with the computer completely powered off. I tried removing the RAM and reseating it. I have tried unplugging the battery, and plugging the power adaptor in. It still does the same thing. There no response to the power button at all. I tried a number of different key combinations that I found on various web sites, it will not respond to and key combos with the power button. It seems to just be stuck turning the fan on and off for over an hour now. I will unplug it, so it doesn't cause any further damage.
does anyone know of anything else I can do? I cannot afford to call Apple or have it fixed. Usually, I am able to fix these problems in my own.. But I'm not sure what to do now.
Thanks in advance

Can you borrow a power adapter from someone and try that adapter with your machine? That would, at least, solve the problem or eliminate the power adapter as the problem.
If you have an Apple Store nearby, you should be able to get a free test and estimate for repair. It may be something simple, it may be something more complex. But if changing the adapter doesn't work, that's what I would recommend. If it is the adapter you're just going to need to buy a new one - and if you must do that make certain that you order a GENUINE Apple adapter.
Good luck,
Clinton
MacBook Pro (15-inch Late 2011), OS X 10.??, 16GB Crucial RAM, Crucial M500 960GB SSD, 27” Apple Thunderbolt Display

Monitor not turning on

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