Sign Of A Failing Power Supply?

[sblake]

My P5N-E SLI-based PC was solid for over six months. Now when I power it on it the first time in the morning, the fans come on with nothing on the screen.
If I hold the power button in and let it shut down I can get it to boot but I get a "Fail to Boot" error. I press F1 and it boots up to windows and I don't have a problem until the next morning. I haven't made any changes to hardware or system. Is this a sign of a failing power supply?

 

[mpilchfamily]

Considering the PC is giving you a boot failure when you do get it up and running tells me its booting the first time. Which means either your monitor isn't detecting the video signal or the video card is on its way out. Try to borrow another card and try it first thing in the morning to see if you get the same problem.

 

[sblake]

If the test card is a different manufacturer, will I have to load any drivers to try it?

 

[mpilchfamily]

Well since your testing to see if it comes up in a cold boot then its not really anything you have to worry about. If you don't see the bios and windows boot screen after starting the system up then you know the video card isn't the problem. If you do see the bios and boot screen then hit F8 just before it gets windows going so you can boot into safe mode to clean out the old drivers and install the new ones if needed and if you intend to keep that card. If its another 7600GT then no driver change is needed. A different Nvidia card may or may not need different drivers. It depends on how far above or below the card is from your current card. If its an ATI card then yes you will need to clean out the old drivers and install the ATI drivers.

 

[sblake]

Problem Fixed

Changed Video Cards
Reinstalled Video Drivers
Changed Power Supplies

Finally changed memory and that corrected the problem. I had previously run Memtest86 but it showed no errors. Apparently there was not enough voltage to post but enough once it was running. It appears to be fixed now.