Computer does nothing/ Motherboard or Processor?

Asus P5b desktop board
February 21, 2012 at 06:46:23
Specs: Windows XP, 3.2GHZ Intel/2GB
Here is a problem I went thru which led me to knowing either motherboard or processor was at fault. I would like to know how to determine which was at fault and how to do it? I had a computer that was left on all night. When I got up in the morning, it no longer was running. When I tried to turn it on sounded like it was coming on but no display, no beeps. I replaced power supply and video card and still the same. No beeps nor sound of hard drive engaging. So from there I would like to know how to determine whether the motherboard was at fault or the processor?

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#1
February 21, 2012 at 08:46:37
Probably not the fault of either of those items.

So you are using an Asus P5b motherboard?
http://www.asus.com/Motherboards/In...

What are the remainder of your specs. Be specific. List the brand and full model of both the power supply and the graphics card.


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#2
February 24, 2012 at 09:12:30
I stated that the power supply and graphics card were replaced after this incident. Since the power supply and graphics card worked in another computer, I knew those were not the culprit! Also all other components were checked! So now I propose the question again. How do I determine which is at fault when computer does nothing except power on, Motherboard or CPU?

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#3
February 24, 2012 at 10:01:48
"Since the power supply and graphics card worked in another computer, I knew those were not the culprit!"

The above statement is not necessarily true.

To answer your question there is no real way to determine if those are the two choices other than testing the CPU in another compatible computer.

That said, IF there was some sort of power surge the first hardware to be affected is the power supply, then the board, then the CPU.

The power supply you are migrating for testing may not be suitable for your problem system for a number of reasons. There are variables beyond the graphics card.


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#4
February 24, 2012 at 11:15:40
could u check computer temps ? like cpu temperature or internal temperature?
could u get into bios ?
what othehill is saying is correct if a hardware component ran on another pc it does not mean its not the problem, speacially the power supply the other computer might be less power demanding than urs, that said what are ur system specs? what was ur computer doing all night running ?

computers are a second home
NVIDIA GeForce
GS_Toxict51


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#5
February 24, 2012 at 11:24:40
Originally stated was the fact the computer shut down on its own. There was a surge protector turned on. Power supply was replaced following day, since original was 3 years old, didn't want to take anymore chances with it. Am lost on what you say about the video card working in another computer doesn't necessarily mean will work in that one!(besides compatibility which was checked) Never had that happen in the 10 years I have put these things together! Still I lack the knowledge of determining when a motherboard/processor fault in the original situation I have stated. As to save money in the future would be great to find someone that has knowledge to answer! To believe that neither is at fault after replacing power supply with a brand new one along with brand new video card(put into wife's after dumping board/processor) is way beyond me!!! Please think about the proper way to answer this question as all parts were tested except motherboard and processor and proved fine! So will state again, but add something! Besides putting a processor in a new board, what would be the way to determine whether a motherboard or processor is at fault? Serious answers only please!

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#6
February 24, 2012 at 12:06:07
I know about burning processors! I had a 2.5ghz that showed up overheated in bios. Unfortunately, the stated computer only the power supply seemed to come on and nothing else. Am I right in assuming since nothing else seemed to power up, the motherboard fried? Also this was the case even after power supply was replaced with new one! I am not a tech, just an alley type mechanic, so as to ask a pro want to know proper thinking. 2.5ghz was a computer that froze during use, I rebooted into bios to find at temp 200 or close. Shut down, replaced CPU and had no further problems! One stated was never able to get back into bios, which is another fact that leads me to believe motherboard issue. Second fact would seem that since power dead ended at power supply, no hard drive turning on or lights is another good indication. That is how I determined to toss board. Was hoping others had some better knowledge to offer. Also computer was left on unintentionally. Usually I shut my computer off at night, but there are nights I do forget and this was the only time I ever paid for forgetfulness. I still believe that since there were lags in boot up time the board was a ticking time bomb, which is rare for ASUS, but we are all human and make mistakes!

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#7
February 24, 2012 at 12:14:11
remove the processor, bench test the board, and see if you get any beep codes. could also eyeball it for any burn marks.

larry


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#8
February 24, 2012 at 12:27:09
I don't think you will get beep codes if the processor is out.

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#9
February 24, 2012 at 12:51:12
I don't think there's any definitive way to tell. After a visual inspection for bulged caps etc, it's hard to tell by current. Since Mobo's fail a lot more frequently that cpu's, I would replace the board first. If you have a brand new psu, like you said you do, you should be good to go. I'm gonna put my money on the board being toast.

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#10
February 25, 2012 at 04:51:14
The only way to test whether the CPU or motherboard is at fault is to test either a known good CPU in your board or test your CPU in a known good board.

There is no magic trick to it. Of course one time I had a powersupply failure, it turned out both my motherboard and CPU were fried. Unless you have compatible spare parts then it may be best for you to take the board & CPU to a tech to have both tested.

Goin' Fishin' (Some day)


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