I'm working on a computer with a strange problem. According to the user, the motherboard threw sparks and the machine was sent back to Compaq, who replaced the motherboard. Ever since, the numpad won't work. It doesn't matter if you change keyboards - whether multimedia or simple - the numpad still won't work. If you turn off numlock, some other functions of the keys work.

I've been assuming that this is a hardware problem, but it's possible that they did something weird when re-installing the motherboard, for instance, if they didn't re-install Windows XP, perhaps something didn't get associated with something else.

The only thing I've done about it was to go into the registry to set the numlock to be turned on by default, which it now is, but when using something like Calculator, nothing happens.

Anybody got any ideas, or know how to reset the keyboard mapping to default?

If the MOB threw sparks then any number of other circuit are probably fried as well.
Entire system needs to go back/be replaced.
Not worth your time to even work on...


Koan

Well, it seems to work fine, other than this problem. I was busy cleaning malware and updating Windows and so on. It's quite usable, except for having to use the numbers at the top of the keyboard. My opinion is that if it's still broken when they got it back, they should have sent it back again. But I don't even know how long ago the problem occurred.