Monitor shuts on/off

1. Make sure that the monitor cable is firmly seated to the Video connector.

2. Check the monitor power cord.

3. Verify that the monitor is properly identified by Windows.

4. Check the top of the monitor, and see if it feels excessivelyhot.
If so, the monitor is starting to fail.

5. Try a different monitor.
If the problem goes away, then the monitor is starting to fail.

Chas

Its a brand new monitor, I have checked all cables and even switched with another monitor, same problem, its obviously not the Monitor

Okay,

The monitor was just the most likely suspect.

My next suggestion would be to make sure that the video card is firmly and fully seated in it's socket.

I have seen many AGP cards that are just a few 0.001" from seating cause the video to drop out, or even prevent the PC from booting.

When I suspect that the AGP card is not fully seated, I remove the bracket, and seat the card firmly.

While you have the card out, it would be worth it to look the solder joints for the video connector under magnification.
The solder should look shinny, and have a slightly concave slope up the lead. There should be no cracks, and the fillet should be continuous for at least 75% of the circumfrence.

If this is a PC with on-board video, Iwould double check that the RAM modules are fully seated.

Other things to check:
How big is the power supply vs. how much hardware is on the system? Minimum for a P4 is 300 Watts.

Try running with the case open to see if the video card is over-heating.

Check that all fans are spinning properly.

It is also possible that there is a bad solder connection on the video processor or V-RAM.
The best test is to try a different video card.

Chas

I am a technician, I have done all that, the card is seated correctly and is not defective. This must be a software issue, or possibly bios or something. Ihad a similar problem a year ago and I fixed it by adjusting the refresh rate, however I dont think its the case with this issue. Video is Ati expert2000 agp card ultra 32meg, and monitor is Hansol 920a M/b is ESC Elitegroup, using 256ddr memory

You didn't mention where the system is located if it's plugged into a curcuit that may have a refrigerator or something like that starting and drawing enough line current to cause this. Also some laser printers start and stop at various times. This may be a heat issue, bad neck board, horizontal output problem, leaking capacitor or many other components in the monitor. Just a reminder about troubleshooting skills; most of the time you have to eliminate problems more so than hoping to find one. So if you haven't tried another monitor or connected that one to another PC, then that possiblity can't be excluded just because it's new. Could have been damaged durring shipping or who knows what else could have happened. Obviously that's why warranties exsist.

as I said previously, monitor has been switched, same problem, it is not an electrical issue, first, I have had all electrical outlets back to power source checked, and second I ran this of a very high end power conditioned UPS, although, its possible there may be a hardware fault, I highly doubt it.

Well, I have two ideas.

First, you mentioned you checked Power Saving settings, but you only described the ones from Windows. Did you also check the CMOS settings?

Second, the problem actually sounds similar to what happens when one of my games takes/releases control of the video card( i.e., when I start a game, and the game switches my video resolution, then resets it when I quit the game). So I would check the startup programs (MSconfig.exe, Startup tab) and make sure there is nothingrunning that might be munging your video settings.

Just my two cents. Good luck.

You mentioned that none of your power settings is set for less than 5 hours. Try disabling ALL power settings including those in cmos. I've had some systems do wierd stuff because of power settings. Luck.

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