First, my PC:
Asus P6T (non-deluxe)
3x2gb Kingston DDR3 1333 kit
GTX260 (Gigabyte brand, I think)
Corsair HX620 power supply
Windows 7 64-bit
My computer has run in its current config for approx. 1.5 years.
My computer was on overnight last night, and this morning I told it to 'sleep' (as I have done in the past with no issues), but when I got to it this afternoon, it would not wake up (The fans sounded like they were on, but nothign on the screen).
So I held the power button in until the PC turned off, and then tried a reboot...
Since then, I have tried:
1. Remove everything from my case except the Mobo/PSU/CPU+hsf, then rebuilding. Still no go.
2. Tried a different video card
3. Tried different configurations of RAM (including with NO ram, to see if I'd get any POST)
4. Found a PC speaker and plugged it in to my mother board, and tried most of the above ^ but got no beeps at any point
5. I have tried: CPU/RAM/VGA, CPU/VGA, CPU/RAM (no beeps!). And I tried all of these with the hard drives/optical drives plugged in and out, to see if that made a difference.
When the PC powers on, one of the lights on the case flickers a couple of times, and the case fans and CPU fan turn on, and I can hear the hard drives spinning.
At no stage was I able to get any output at all on the screen (from either video card attempt), and nor was I able to get any beep.
Since it does not work with either video card I tried, I am guessing that the problem lies in the CPU or the motherboard (and yes, I have plugged the other power cord onto the motherboard, which was one of the main problems I have read on the net while researching this).
I have tried googling/etc to find a solution to this, but the problems that had solutions that worked were never QUITE the same as my problem. About the only thing I havent tried is clearing the CMOS with the jumper, but I have misplaced my motherboard book it seems...
So I turn to you guys for any help/advice you might offer! What should I be doing now?
I think I have access to a 430W Thermaltake CPU from an old case. It might not be super-dooper, but it certainly makes that PC work (as recently as yesterday).
I also got no better result with all fans (bar the CPU fan), and all hard/optical drives powered OFF.
I will try this next probably.
Is there any way to isolate if it's the CPU or the motherboard? If I take the CPU out, and just have VGA/RAM/PSU, it should give me POST if the motherboard isn't broken?