My imac has a black screen after I turn it on, help!!

After the latest system update, my imac froze. I turned it off holding down the power button. Now every time I try to the system on, a black screen appears and nothing else happens. What do I do?

Looks like the same thing just happened to my wife's 20"G5 iMac. After the most recent update she said the system crashed then on startup after about a minute of the spinning wheel the screen went black ... nothing happened. So after leaving it for 20minutes I shut it down by holding down the startup button on the back ... same thing, and again a further two times. So the issue wasn't a one off.
Then as I started to surf discussions to come up with a solution it came right by itself ... I don't know what it was. Maybe it just needed more than 20 minutes to set itself up. Or maybe it just needed a few prods to get it started.
Just thought I had better try a restart again to see if the problem was actually solved ... same thing happened. Now after about ten minutes after startup it comes back on ... weird. No time for doing a whole lot more than that at the moment.

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You are posting this in a server/enterprise message board. You might have better lucking posting it somewhere else.
You can try hooking up an external display to your iMac to see if it's a problem with the iMac screen or the logic board. If you get an external display picture, then you probably have a display problem in your iMac (bad lcd, bad back light, bad power to display, etc).
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How do you fix an ipod that has a black screen and it turns on but when it turns on the screen gets a lighter black but you still can't see the apps or anything?

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Ok. so you stated the screen remains gray. Is it just plain gray? Does it have a folder with a question mark on it? Do you see the little pin wheel thingy?
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Hi
Please try the following link given below might help you to fix your issue.
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"I work for HP."
****Click the (purple thumbs up icon in the lower right corner of a post) to say thanks****
****Please mark Accept As Solution if it solves your problem****
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Hi Autoexit173,
Welcome to Lenovo Community!
As per the query we understood that you are facing issue with system not booting in your Lenovo G560 laptop.
As you have mentioned that the system not booting, please try to remove the RAM and turn on the system and check if you can hear any beep sound. Also try to clean the RAM slots and check for the issue.
Click here for the steps to remove the RAM and refer page number 40.
Hope this helps. Do post back if issue persists!
Best regards,
Ashwin.S
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My iPhone has a black screen!

Hello apple community. My dad just sent me a used iPhone 4s for my birthday about 1 week ago. Today I was using my iPhone and I went to eat and left my phone on my bed. Then when I came back , I tried turn it on and it didnt turn on. It has a black screen but it functions properly. It might be a display screen error or something. I tried the famous method of pressing the home button and the power button at the same time for like 10 seconds but it still wont work. I also plugged it in on my computer and it shows everything on there but my iPhone screen is still black. I hadthe same problem earlier when I got the phone but it turned on after a little while of charging it. What is going on? I live in a small town in Mexico and there are no Apple stores nearby! What should I do? Please I really need your help on this issue. Thank you very much for your attention and hopefully you guys can help me.

Hello there, Kevin Barreto.
To make sure if it is a hardware issue or not, the following Knowledge Base article should help guide you further:
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http://support.apple.com/kb/ts2802
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Hello friends,
Starting from late Dec., my laptop goes black screen after "waiting for udev uevents to be processed", after updating kernel to 2.26.32.*. The strange thing is that even the screen is black, the keyboard is working. For example, I can turn on/off the status lights of capslock and others. I guess something might be wrong with udev uevents configuration with regard to the latest kernel. I've noticed that in the new kernel, there are two drivers for intel integrated graphics. My laptop has a 855G, which is supposed to be functional by both drivers, at least according to the kernel description. Maybe because the udev is configured to use the second driver (for newer graphic chips), rather than the first driver, which caused the problem?
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Last edited by Wen (2010-01-28 13:14:28)

Have a look here: http://bbs.archlinux.org/viewtopic.php? … 70#p695670

My imac has a black screen after I turn it on, help!!

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