hi friends
I am kaleem I have problem with my monitor... that when ever I longin in computer... then suddenly my computer goes to standby mode randomly intervals... and the light of hard disk and voice of fan remain on... while the screen goes black or in standby mode... I have change processor, ram and vga card... all are OK... I don't know where the problem exist...
if some one have any informations about this issue the please share with me... I will be thankful for all of you..
best of luck. Kaleem

I'm not sure if this is the problem or not, but monitors are commonly shut off to save electricity. It appears that you're more sophisticated than simply forgetting this, but I thought I'd point it out just in case.

If you right-click on the "desktop" (somewhere in the middle where there are no icons) and select "Properties", a window will pop up labeled "Display Properties". If you click on the "Screen Saver" tab and then on the Power button near the bottom-right (above the "Apply" button), You come for a Power Options Property window. This window lets you configure when the monitor will turn off and when the hard disk turns off. It also lets you configure when the system goes into standby.

I have changed these settings but not possitive result come out... the same problem exist when computer starts before blu screen its goes standby mode... randomly.. I don't know where the problem exist... if the bios settings are required then please let me know... I willl be thankful of you...
with best wishes and luck..
kaleem