Solved PC turned off, won't turn on

Acer / ASPIRE
November 24, 2011 at 09:00:13
Specs: Windows 7, AMD Athalon
I have an Acer Aspire Desktop. One day there was a burning smell and computer turned off. I disconnected everything, waited a few hours, then days, nothing happened when I tried to turn it on. I opened the case but did not see any signs that the mother board had fried. I tried replacing the PSU (which was a non-standard unit that I had to order) and now the blue light goes on and off and the fan jerks when I plug it in the wall socket, but then nothing. Pushing the power button does nothing. Do I need a new motherboard?

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✔ Best Answer
November 24, 2011 at 12:43:46
Unfortunately, when a powersupply has a meltdown it often takes other components with it. Only by replacing and testing with known good spare parts can you determine the extent of the damage. Unless you have access to a full set of spare parts including powersupply, motherboard, CPU, ram & graphics you may not be able to determine which other components have failed.
What you can do is to disconnect all power & data cables to optic & hard drives, remove any/all plug-in cards. Leave only the motherboard, CPU with it's fan, keyboard and monitor. Leave only 1 stick of ram. Now try to boot. Do you get any BIOS Beep? Any display onscreen?

In my experience it can be something as simple as a faulty drive that prevents bootup or even a failed PCI card or slot. I had one motherboard that would fire up perfectly well with PCI cards in any of 4 out of 5 slots. Any card inserted in the damaged slot and it would not boot.

There have been occasions where I have pulled the motherboard & CPU and taken them to a tech for testing. ( turned out both were faulty but I had no way to tell without buying replacements )

So you need to work out just how much you are willing to spend or simply get a new system and slave the hard drive from the failed unit to retrieve your files.

Goin' Fishin' (Some day)



#1
November 24, 2011 at 09:23:09
are the parts correctly in place?. if the motherboard was burn then you gotta get a new motherboard. you may not know whats going happen when u plug it back in. see if your motherboard looks great with no burn marks or any missing parts then it could be your power box .. make sure you still got that warrenty. So acer can take a look at it and maybe they can repair it .. never do things by yourself.

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#2
November 24, 2011 at 09:51:37
No warranty. Everything is in place, no burn marks on motherboard. Is there any way to test the motherboard to see if it is functional?

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#3
November 24, 2011 at 10:23:55
your CPU can be damage from the heat that cause the burning smell .. which mean that you motherboard could been fried.

take out your memory stick and see if there any burn marks .. then put them back in place .

if you have pins on you motherboard then make sure there secure.

try to replace the power box to see if that the problem..

if you PC wont turn on still then you gotta get a new PC or just send it for repairs


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Related Solutions

#4
November 24, 2011 at 10:56:44
Okay, hang on.. what memory stick? and what is the power box? I replaced the PSU - is that the power box?

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#5
November 24, 2011 at 12:06:05
Also, wouldn't the fans or some of the elements run if it was a CPU problem? Can anybody tell me if there is a way for me to know for sure if the motherboard needs replacing?

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#6
November 24, 2011 at 12:43:46
✔ Best Answer
Unfortunately, when a powersupply has a meltdown it often takes other components with it. Only by replacing and testing with known good spare parts can you determine the extent of the damage. Unless you have access to a full set of spare parts including powersupply, motherboard, CPU, ram & graphics you may not be able to determine which other components have failed.
What you can do is to disconnect all power & data cables to optic & hard drives, remove any/all plug-in cards. Leave only the motherboard, CPU with it's fan, keyboard and monitor. Leave only 1 stick of ram. Now try to boot. Do you get any BIOS Beep? Any display onscreen?

In my experience it can be something as simple as a faulty drive that prevents bootup or even a failed PCI card or slot. I had one motherboard that would fire up perfectly well with PCI cards in any of 4 out of 5 slots. Any card inserted in the damaged slot and it would not boot.

There have been occasions where I have pulled the motherboard & CPU and taken them to a tech for testing. ( turned out both were faulty but I had no way to tell without buying replacements )

So you need to work out just how much you are willing to spend or simply get a new system and slave the hard drive from the failed unit to retrieve your files.

Goin' Fishin' (Some day)


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#7
November 28, 2011 at 06:50:23
Thanks Richard, I have taken everything out and tried it with and without harddrive, dvd burner, etc... I have yet to try taking anything out like the ram etc.. because I don't want to mess with them too much without knowing what I'm doing. The fact that not even the fans and light start to run after the initial contact is made I think is an indication of a power transmission problem, but where that is coming from and what caused it could be complicated, as I have seen by reading about similar problems. As you suggest, I think I'm going to have to get it to someone who can run all those tests. Too bad the diagnosis is going to cost me, even if the prognosis turns out to be "scrap the computer"!

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