Comes on for a few seconds, then goes blank. Power saver setting? Happened after thunderstorm...settings in control panel have no effect. OS is vista...

Go to control panel and check you power saver settings. It's probably set to turn off the monitor after a few hours.

I've seen on a few Windows 7 machines has been the display turning off after only 15 minutes, even though I set the Turn off the Display option to Never. Weird!
You're probably reading this because you've tried changing the power plan settings to Never for everything and your monitor still turns off! This can be very frustrating and usually occurs with new installs of Windows 7, though I've seen it happen on older installs too.
In this article, I'll go through the different ways you can fix this problem. Note that if your computer is on, but the screen is showing No Signal or No Input, you should read my post on fixing blank or black screens. Now let's go through the possible solutions.
Power Options - Control Panel First, we need to make sure everything is set correctly in Power Options. Click on Start and type in power options or go to Control Panel (icon view) and then open Power Options from there.
Click on Start, then Control Panel and then Hardware and Sound, and then click on Power Options.

Click on the Change plan settings link that is next to the plan that is currently selected. In my case, the High Performance plan is selected, so I'll click on the link next to it.

First, make sure that Put the computer to sleep is set to Never. Next, change the Turn off the display setting to whatever value you want it 10,15 min etc.. You don't have to set it to Never if you don't want to. After this, click on the Change advanced power settings link.

Expand Hard disk and then expand Turn off hard disk after. Reduce the value till it gets to Never. Click OK and then click Save Changes on the Edit Plan Settings page.
Screen Saver - Control Panel The second setting you want to check is the screen saver. Go to Control Panel, click on Personalization, and then click on Screen Saver at the bottom right.

Make sure the setting is set to None. Sometimes if the screen saver is set to Blank and the wait time is 15 minutes, it'll look like your screen has turned off.

BIOS, Graphics Card, Monitor The two methods above are the most common reason why your display will turn off after a set amount of time, however, there can be other possible causes.
BIOS - On some computers, the BIOS can have power saving settings that determine how the computer sleeps. These are called sleep modes (S1, S2, S3, S4, and S5). On some computers, you'll see an option called Deep Sleep Control. You may need to disable this in order for the computer to wake up faster.
Graphics Card - If you have a high-end graphics card installed, make sure you have the latest driver and management software installed. If you go through the settings, you may find an option that puts your graphics card into lower power mode or something similar.

Monitor - Lastly, some monitors have power saving features themselves. Usually, the monitor is supposed to go into power saving mode if it doesn't detect any input (HDMI, VGA, DVI, etc), but sometimes it happens unexpectedly.

You'll have to press the buttons on the monitor to get access to the monitor settings. Those are about all the reasons I could think of for your display turning off when it shouldn't. If you have any other questions please post them here ,Best
We Are Here To Help !!

hi when you close your laptop it goinng to stand by mode if you press any key it should resume. you can change this options in control panel, power option then go to advanced tab. By the way hibernation need to be enable and is different than normal shout down. if you need more help let me know.
is it help please rate it
regards

What if you press the "power" button? Does it turn off or turn on?
I hope that you've set the power settings to "hibernate" or "Stand by" mode, please go to the "power" settings and check the settings, if they are enabled, change the settings to your requirements.
If you are using a Windows O.S. then, you can go to the power settings by right clicking on the desktop > Properties > Screen saver > Power and go ahead with it.. or Control Panel > Power Options...
Good luck.
Thanks for using FixYa.

Are you sure that your computer isn't just going into power saving mode? Not sure what operating system you have but go into the screen savers tab or video properties and find out how your system is set up for power saving It may be starting before your screen saver does so the monitor would just go black.

it sounds like your most likely having trouble with the hibernate feature try this
start>>control panel>>power options>> click on the hibernate tab
un check enable hibernate mode
this should fix your issue

try check your screen saver setting, it might be the time of screen saver to appear when PC not used, screen saver might be in blank.cheers.

Turn off your screensaver from your desktop settings, and modify your power control settings from within control panel. Alternately, you can make a conscious effort to move the mouse every 19-1/2 minutes. I think I would change the settings.


If you find my suggestions to be helpful, please share with us some details so that others may benefit from knowing the whole story. Thank you!

Please check the "Power save" setting under "Screen saver"

Does the screen go blank after the computer has been sitting unused for a while or is it immediately blank and does not show a picture. If it goes blank after a while, look in your power settings under control panel on your computer and set the monitor cut off to NEVER, also check your screen saver settings. If it does not show a picture at all check the user manual of your TV to see the supported computer resolutions and then check under display settings on your computer to see if the resolution that you are using is compatible. Hope this helps.