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Motherboard fried?

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First post, by Arnull

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Hi

I have a Gigabyte GA-6OMM7E motherboard which I’ve had re-capped . It ran smoothly and no problems in Windows 98SE. I bought a ps/2 Conpaq keyboard and plugged it in. When I turned on the pc the speaker went bananas. The pc was slow and the text in post appeared very slow and sluggish.

Now the pc appears to behave very odd when either a ps/2 or usb device is attached. When no of these devices are attached, it post just fine. I’ve tried everything. Reset cmos. Different RAM modules. All cards removed etc etc. Can the Compaq keyboard have fried the os/2 and/or usb controller? Or maybe a fuse? I’m not great with checking these things with a multimeter, unfortunately.

Pretty bummed out since it got new capacitors recently…

Edit: picture added. Are any of these components a fuse?

The attachment IMG_5825.jpeg is no longer available

Reply 1 of 3, by deltapi

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Check the underside of the board for any leads that could possibly be shorting to ground, and look closely at any traces running to or from crystal oscillator packages.
I received a board second hand that had a bunch of current dropped through it due to a loose screw, and it damaged a crystal. It experienced very...odd behaviour.

Reply 2 of 3, by Arnull

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It has no contact with metal right now, since it’s on a 3d printed test bench. The problem started right after I plugged in a ps/2 keyboard. Can a crystal be replaced?

Reply 3 of 3, by TheMobRules

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The yellow component should be a resettable fuse, you can start by checking that.

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