Solved is my motherboard shot?

October 30, 2014 at 19:15:24
Specs: Windows 7
when i turn my computer on all the lights and fans turn on but it wont boot up. meaning the usb's dont work, nothing even attempts to appear on screen, and no "digital sounds"come out. is it my mother board?

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#1
October 30, 2014 at 19:56:12
It could be anything. Even though it seems to be powering up that just means the power supply it providing 5 and 12 volts. In order to run properly it needs to provide several different voltages at sufficient current.

Did anything happen to it or did you make any changes between the last time it worked OK and the first time it didn't? Could anyone else have messed with it? Do you hear any beeps when powering it up?


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#2
October 30, 2014 at 20:42:35
i moved into a new home i guess it could have bin bumped, but i basicly just unplugged it put it in a box drove 3 blocks and plugged it back in, worked fine for a month or so then i was useing it, went to the store and came back and it was shut down, went to turn it back on and it seemed like it wanted to turn on, the mouse would flash red real quick and the process would stop. turned it off n back on a few times and it would work then slowly happened more and more. there was some beeping one time and after i unplugged and replugged it worked. oh i did change the watch battery once and it worked smooth for about a week then now it wont even boot up at all. sorry for the long reply. figured the details might help you help me.

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#3
October 30, 2014 at 22:08:16
✔ Best Answer
OK so it's probably not due to being damaged or the hardware changed.

I assume this is a desktop and not a laptop?

First I'd open the case and take a look at the motherboard. One of the more common reasons for motherboard failure are bad capacitors. They start bulging and often have leakage residue on the top. Here's a picture:

http://www.maximumpc.com/article/as...

You can see the three bad ones there with brown leakage reside on the top. It may be hard tell from that picture but they look a lot like a soda can that you've put in the freezer for too long and it's just about ready to blow up. If you find any bad ones that may be the problem.

If everything looks OK on the motherboard I'd temporarily remove any unneeded add-on cards, remove any unneeded USB devices and disconnect the data cables on all the drives. Then start it up and see if the problem persists. Without the drives it won't boot to windows but just see if it starts up and you get the posting or logo screen. If it seems to start up OK then likely one of the disconnected items was at fault.

If you still have the problem then it may be the power suppy. If possible swap in a known working compatible power supply and see if it works then.


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Related Solutions

#4
October 31, 2014 at 09:26:02
If there is a chance that it might have had a bump, check all internal connections.

Another thing that can happen is RAM or some other card has moved slightly and hit an unused area which has oxidized. Clean edge connectors of RAM and any other cards with a soft pencil eraser then pop them in and out a few times to clear any oxide off their sockets.

Another area where I have hit similar trouble to above is SATA disk connections - both signal and power.

Some of this is effectively covered by post #3.

We need to know if this a laptop or PC so that we can focus our responses better.

Always pop back and let us know the outcome - thanks

message edited by Derek


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#5
October 31, 2014 at 16:12:23
i did exactly what u said about unpluging and checking and stuff and nothing was running and i found a motherboard tester for 3 bucks at a pawn shop out of pure luck and it turns out my motherboard isss shot. thank you so much for ur insight. saved me a lot of time and money narrowing down the cause.

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#6
October 31, 2014 at 16:50:45
OK, thanks for taking the trouble to pop back and let us know.

message edited by Derek


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#7
October 31, 2014 at 17:47:36
I'm not sure how reliable those are. I think they depend on everything else being OK. But hopefully you've isolated the problem.

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