5160 Fan won't turn on

Hello all - I've been having trouble with my 5160 fan for the last few months. At first it was making some grinding type noises, and then it stopped working completely.

I bought a new fan (actually two new fans... anyone need a 5150 fan?) and now the fan doesn't want to do much. It turns on at boot-up, but only very briefly, and then it turns itself off immediately.

I ran the BIOS diagnosis - it says there's something wrong; the fan isn't working. Lovely diagnosis.

Any help?