Corsair ValueSelect 1024 mb PC-3200
500W Rosewill (no it's not a POS) PS
It works perfectly when it's on. Perfectly. I can run ultra-high end games without a hitch. The problem comes when I am forced to restart or otherwise power down. What happens next varies, so I'll outline a few facts:
-The computer will sound like it's booting normally except there's no health beep and the monitor reads "NO SIGNAL"
-I swear and manually power it down and back on. It then almost always starts and gives a long-short-short (VGA) beep code. There is nothing wrong with the video card or the monitor as I have tested both in other systems.
-I restart again and it does the above. Repeat.
-I turn it off after a beep code and leave it plugged in. A random amount of time later (seconds to minutes), it TURNS ITSELF BACK ON. And beeps again. I scream.
-It usually then boots normally if I leave it unplugged for 24-36 hours and then try to boot again. I have no idea why.
-Today it has been off for almost 48 hours and it still won't boot
The last time it stayed dead for this long, I replaced the crappy generic power supply with the nicer one I have now. It worked perfectly for a week and then this started happening again.
I replaced the motherboard, thinking this could be the problem. The replacement was the revision 2.0 version of the board above. I try to boot with and without peripherals, and there's no POST or error codes of any kind. All of the components start up, though. The monitor doesn't get a signal at all. Here's what's certain:
The VGA is fine.
The PSU is fine and stable.
As far as I can tell the HDD is fine.
All components have power.
Temperature is fine.
The only thing left is the RAM, really... but what confuses me is that sometimes it works fine. I've switched sticks, tried one, nothing. Pretty much the only way this could be happening is if there was some sort of defect in this series of motherboards. I don't know.