Period Key Doesn't Work, Even After Keyboard Replacement

[Kamryn]

I have an older laptop, and a couple months ago, the period key stopped working. I think that is the only key, so I ordered a keyboard.

I just replaced it, and it still doesn't work. How can that be?

[LMitchell@9475]

I switch out the hard drive in two of my computers, it worked fine until I told it to reset the info. I did a diagnosis on the hard drive everything passed. once I leave the test screen it goes blank and nothing. I tried to use my restore USB drive but it doesn't see it. I changed the boot order to boot from the USB still nothing. Help I'm trying to get it set up for my grandson.

[Kamryn]

I'm guessing that somehow, the keyboard port on the motherboard must have gone faulty, which is why the key doesn't work, even after a keyboard replacement. It's weird, that it's only one key, because usually when that happens, it affects a cluster of keys.

Thank you for your help.