Help with faulty computer.

[ohwell26]

Hello there. I've been having some trouble with my computer. When I press the power button the only thing that happens is the fans (and the SATA devices) turn on. To be more specific, the case fans and the fan on the GPU turn on, while the CPU heat sink fan does not turn on. Actually, occasionally the CPU heat sink fan turns on, but very weakly. In addition to the fans, the motherboard's lights turn on, and the DVD drive (and I think the hard drive) turn on as well. Apart from that, nothing happens, nothing on the monitor, no post, no beeps, nothing. I don't know if this board has a built-in system speaker or not.

See normally before the problem, when booting up the fans would spin for a few seconds, and the GPU fan would spin really fast and sound like a jet engine, and then a couple seconds later the system would POST. Right now it's only reached the "jet engine" stage, so to speak.

A small tidbit that may or may not be relevant is when I turn the thing back off, by hitting the PSU switch, it goes off and then maybe 5 seconds later the blue light in the PSU flickers for a second despite the switch being off.

I know for a fact that the motherboard is not at fault. How? I replaced it, thinking that it was the cause, and now today, having just recieved the new one, the same problem is happening. Hence me making this thread.

Here's the current specs:

Q6600 Quad Core
2x2GB Mushkin Memory
600W OCZ Power Supply
Gigabyte EP45-UD3P motherboard
EVGA 8800GT GPU

I really have no clue now which part I need to replace. I've taken apart and rebuilt the thing countless times so don't ask that. Unfortunately I don't have another computer which is compatible with these parts to individually test them, so I can't do that either.

My intuition says it's either the power supply or the processor... but I really can't be sure. Any ideas?

 

[sirmonkey1985]

could be the motherboard going back.. but first id check by only using 1 stick of ram and see if it boots up correctly.. if not then just reset the bios by pulling the cmos battery and unplugging the psu... wait about 30 seconds to a minute.. put the cmos battery back in and plug the psu back in..

 

[Dangman]

Hit up the Basic troubleshooting thread on what to do when your system does not POST.

 

[ohwell26]

could be the motherboard going back.. but first id check by only using 1 stick of ram and see if it boots up correctly.. if not then just reset the bios by pulling the cmos battery and unplugging the psu... wait about 30 seconds to a minute.. put the cmos battery back in and plug the psu back in..

I already said that it's a brand new motherboard showing the exact same problem as the previous one. What would the point be of resetting the BIOS? I'm 100% sure there isn't a problem with the motherboard.

Hit up the Basic troubleshooting thread on what to do when your system does not POST.

Yeah yeah, read the FAQ, I know. I've already done all that stuff as I made clear in the OP. Besides, that stuff says it's for systems which have never POSTed before. This thing ran fine for a year until one day it stopped working. Replacing the motherboard which was the most likely culprit did nothing.

I need ideas on what to do now, to decide which part to RMA.

 

[Dangman]

Yeah yeah, read the FAQ, I know. I've already done all that stuff as I made clear in the OP. Besides, that stuff says it's for systems which have never POSTed before. This thing ran fine for a year until one day it stopped working. Replacing the motherboard which was the most likely culprit did nothing.

The guide can also be applied to systems that has POSTed but stopped. Also your post did not indicate that you had stripped the system down and placed it outside of the case.

Anyway, my gut says it's the PSU. Try to use another PSU if you can.