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Computer won't boot - bad motherboard?

By CuriousInfo ·
We had a thunderstorm that knocked the power out for about 1 minute. Now when we turn PC back on the green light comes on for about a minute then goes out. Fan does not come on, no POST, no sound at all from hard drive. It appears dead. I think motherboard was hit. It did have surge protector but I don't know how good it is. I don't have a PCI diagnostic card to test it. I don't think its in Sleep mode, hitting key or mouse does not do anything either. How else can I determine if its the motherboard?

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Computer won't boot - bad motherboard?

by sgt_shultz In reply to Computer won't boot - bad ...

well, i bet you are right and mbd is fried but can you try another power supply before you give up on it? also try unplugging all cards, drives...

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Computer won't boot - bad motherboard?

by CuriousInfo In reply to Computer won't boot - bad ...

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Computer won't boot - bad motherboard?

by paw_blue In reply to Computer won't boot - bad ...

ok firstly what motherboard are we talking about here? what type of cpu and what ram do you have?

A few things are possible.. If you motherboard is damaged you may be in for a nasty surprise you cpu and other parts may also have been fried. it could also just be your power supply unit. it is possible that a fuse has blown inside this. however the green light coming on almost rules this out. Your ram may be fried too .

I would personally remove all uneccesary parts from the motherboard, strip it back to the motherboard power supply unit video card ram and cpu of course.. remove sound card andy network cards or the likes also unplug your harddrive and floppy disk drive. if the same occurs try finding another psu to test it with or you can uplug the psu you have now and (BE VERY CAREFUL IN THIS PART)unplug the power supply unit from all drive (optical floppy, and harddisk) now grab a small piece of wire and place it in two holes of the atx form adaptor.. the little piece of wire needs to go from the one and only green wirre to any one of the black wires. this will test the psu.. you should be able to get it to work without having it plugged into the mothebroard. if this doesnt work.. I would try a new (known working) PSU If this does work then we can rule that out as being the cause.

Next step is to reset the CMOS of the motherboard. Check your manual to see where the reset cmose jumper is and follow the instructions on how to reset it. then once this is complete try to power up the computer. if it works then you are home and happy. if you get the same issue then I would substitute the ram and cpu with known working parts if this still fails then contact the vendow about gettign the motherboard tested. I hope this help.. and I m sorry its such a long read

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Computer won't boot - bad motherboard?

by CuriousInfo In reply to Computer won't boot - bad ...

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Computer won't boot - bad motherboard?

by superman79 In reply to Computer won't boot - bad ...

First of all when ou get hit by a power surge your power supply is hit first. In some cases only he cards get fried, try to remove all your cards one at a time and see if it turns on. start with your modem and see if it works wiht out it, Also snooparound your motherboard, if it did get fried most of the time you can smell burnt odors or see spots black.

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Computer won't boot - bad motherboard?

by CuriousInfo In reply to Computer won't boot - bad ...

It was the modem!

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Computer won't boot - bad motherboard?

by JohnGreer In reply to Computer won't boot - bad ...

Which green light come on at power-on?

The power-supply could have been fried.

Tech support will ask you to unplug (and remove all batteries if it's a laptop). Leave it unpowered for a while (10-15 min), then replug and try again.

Have youtried booting from a floppy? Does the floppy have power?

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Computer won't boot - bad motherboard?

by CuriousInfo In reply to Computer won't boot - bad ...

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Computer won't boot - bad motherboard?

by TheChas In reply to Computer won't boot - bad ...

I would start with an inspection of the boards and power supply.

First, check your modem for any signs of burnt parts.

Next, look at the large capacitors and transistors near the CPU.
If any look burnt or bulged, then the motherboard is toast.

With power un-plugged, open up the power supply.
Check for a fuse and burnt or bulged parts.

If you do not find anything, start by swapping in a different power supply WITH ALL plug-in cards except video removed.

Chas

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Computer won't boot - bad motherboard?

by CuriousInfo In reply to Computer won't boot - bad ...

It was the modem!

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