Computer is dead, ideas on problem?

K

KD28

Weaksauce
Joined
Mar 17, 2007
Messages
113
Problem:
So, my computer wont post. When I turn on power case fans turn on, I have power to the cd drives (can open them) but I get nothing on screen and no beeps no nothing. Power indicator on monitor looks like no signal is received at all.

Brief history:
Built computer about 8 months ago. Ran fine, no changes for bout 6 months. 2 months ago added Xi-Fi gamer and again it ran fine without problems untill about a month ago.
Was watching TV, computer was just idle. There was a loud screech then static to all my speakers. :eek: Graphics on screen were fuxxored. Tried to reboot. Nada. :mad:

Assumed it was mobo or vid card. Tested vid card in brother's computer. No problems there.
Ordered and replaced mobo with P35-Ds3L and same thing. No post.

Now, wondering what else it could be. Noticed that heat sink fan is not spinning, wondering could it be the PSU is bad? Maybe the rail that supplies mobo is bad? Thing is that the Xi-Fi has optical out. I can see red light there meaning that the PCI is getting power. Could this be?

What else might I try (probably will try another PSU later today).

Can it be a RAM problem? Would ram problems keep it from even posting?

Friend thought maybe something in case was touching mobo and shorting it. Maybe but I just took everything apart to replace mobo, didnt notice anything.

Any ideas? :confused:
 
I assume resetting the CMOS doesnt help so...

Unplug everything you dont need and see if it can POST.
ie leave only motherboard and graphics card plugged into the PSU.
Unplug the cables from hard drives etc too as a faulty drive can still short connections.

If that works, either the PSU cant supply enough power when everything is connected or something that was plugged in is faulty.

Try using one memory stick at a time in different slots to see if a memory stick or slot has a problem.
 
Do i even need the ram to post? Will mobo post without any ram sticks in it?
 
You mention that the HSF is NOT spinning. The initial screech could have been the fan failing which caused your CPU to overheat and fry. Have you checked your CPU?? Also, some motherboards won't POST unless a working HSF is detected.

My $0.02
 
CoachB said:
You mention that the HSF is NOT spinning. The initial screech could have been the fan failing which caused your CPU to overheat and fry. Have you checked your CPU?? Also, some motherboards won't POST unless a working HSF is detected.

My $0.02
Click to expand...

Yes, and the HSF power connector must be connected to the motherboard CPU_FAN power header for it to detect it.
 
Just tried sticking brand new (stock one that I never used) heat sink fan to the cup fan slot of mobo. No dice. New fan not spinning either.

Do I now assume it to be the PSU?

(again, some parts of psu is working ... case fans work, pcie connector for vid card works cuz that fan is working. Mobo is getting SOME power since red optical out light of sound card is lit)

hmm even if my cpu is dead, mobo should post still right? What exactly is the bare minimum I need for mobo to post? If i can get post, i'll add 1 item on at time to rule stuff out.
 
do you have a spare power supply?If not is there a repair shop near by that can test.usually want cost anything.power supply may be putting out just enough to make a few things work.The fan for the cpu not working does not sound goodl
 
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