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Old 02-13-2010, 04:36 AM
 
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I have a three-year old Gateway computer and a Samsung Monitor. I turn it off at night but, otherwise, it's on whenever I'm home.

For the past week, whenever I leave the computer for a while and then come back and use the mouse to wake the screen up, the screen flickers badly and then goes black.

At those times, I cant turn the computer off unless I unplug it totally. Then, when I turn it back on, everything is fine.

I've been planning to get a new monitor anyway but now I wonder if I need to start thinking about getting a new computer, as well.

I'm very computer-ignorant so please be kind and use small words in your posts. Thanks so much.
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Old 02-13-2010, 09:14 AM
 
Location: Somewhere in northern Alabama
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Could just as easily be the graphics card in the computer that provides the signal to the monitor. Borrow another monitor, see if the problem goes away. If it doesn't, try replacing the graphics card.
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Old 02-13-2010, 11:00 AM
 
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Thanks so much, harry. I had googled the problem and found that the graphics card was suggested for monitors that flicker and go black when the computer is turned on. But I didnt know if that could also cause my problem. I'll buy a new larger monitor (which I was planning to do anyway) and see if that's it. Than ks again!
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Old 02-13-2010, 11:01 AM
 
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Also go around and make sure the plugs between the monitor and the computer, and monitor and power are all secure. Unplug and plug them back in. Sometimes they work loose and can cause the monitor to act weird.

And if it works it's a free fix.
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Old 02-13-2010, 11:10 AM
 
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Thanks, scarmig. What has me confused is that (1) this happens only when I've left the computer on, but not in constant use, for a few hours and (2) when it happens, I can NOT turn the computer off. I have to unplug it to do so.

That's why I wondered if the problem might be something other than the graphics card. The graphic card and dust were the two main suggestions (well, the only two suggestions that I could understand ) when I googled similar problems.
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Old 02-13-2010, 01:14 PM
 
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Check properties.

On the desktop right-click and choose Properties. Go to the screen saver tab and click on Power. On this screen, if there is an option for "go to sleep", turn it off. Turn off hibernation also (separate tab)

See if things change.
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Old 02-13-2010, 02:15 PM
 
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WOW, Tek_Freek. I think that did it. THANKS (and Reps) to you!!!!!
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Old 02-13-2010, 02:43 PM
 
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There are a lot of computers that do not handle sleep and hibernation correctly. I had a client that ended up sending his HP desktop back twice before they got it fixed. His would go into sleep mode while he was typing (and no, he wasn't hitting the sleep key by accident) and would require a complete shut down like yours.

I'm glad that might have fixed the problem.
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Old 02-13-2010, 02:50 PM
 
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I dont understand why the screen-flickering-and-then-turning-black-after-being-awakened-from-sleep issue just happened after three years -- or why it resulted in my not being able to turn off the computer unless I unplugged it. I'm always interested in WHY things change. But I'm so computer-illiterate that I wouldnt be able to figure this one out. I'm just appreciative that it's been resolved. Thanks again!


Edited to add that Firefox recently added some updates/upgrades, right before this problem started occurring. Again, I dont know enough about anything to know if there might be a relationship between the two -- but I'll google Firefox upgrades to see if anyone else has reported anything similar.


Edited again to add that I did find some reports of this flicker after Firefox upgrades but the problems and solutions are written in computerese and I dont understand even the three-letter words.

Thanks again...at least my wake-up problem is solved.

Last edited by TFW46; 02-13-2010 at 03:06 PM..
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Old 09-26-2011, 10:15 AM
 
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My monitor started this recently too. It's a Samsung LCD attached to a HP Compaq desktop computer. It's the main monitor and I have another monitor attached too but it doesn't do the flicker to black deal. I can wait til it goes black then turn off the monitor and turn it back on and it is fine again.
I'll try turning off the power setting and see if that fixes it (running Windows 7)
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