PS/2 Mouse Port failure

[xane]

Last night I discovered the PS/2 mouse port on one of my machines was no longer working, I was getting the "no mouse detected" error in Windows. It was working fine the previous night, and I have not done anything since.

I changed the mouse with no effect, I proved that both of them worked fine on another machine.

I booted into DOS command prompt and tried using the Microsoft Mouse DOS driver, it could not detect it, so I enabled the serial port and plugged a serial mouse into it and it was fine, worked in Windows too.

Nowhere in the BIOS does it mention the PS/2 port, I can only assume it is always enabled.

The keyboard and mouse PS/2 sockets share a physical component, like on all PC99 mobo layouts, but the keyboard is fine.

This is the same mobo that I had problems with the +5V line, which suddenly started becoming less tolerant after 2 months of use, I had to upgrade the PSU, I feel this mobo is disintegrating slowly.

Anyone ever experienced a mouse port go dead suddenly ? Any other tricks I can try ? Last time I sent it back they found nothing wrong and charged me £12 for wasting time, I don't want to do that again

 

[Embattle]

I did have trouble with my last motherboard that sometimes found it hard to detect the Keyboard although I replaced soon afterwards, never had one go totally dead though.