So sometimes when I tell my computer to standby, it will do so, but after few
minutes, the fan will start roaring and the CD drive sounds like it's
spinning its heart out. During these antics, the computer comes back from
standby without even touching the mouse or keyboard (perhaps fury of the fan
moved the mouse a bit? No idea).

Anyhow, since this is not a software problem and hence no stack trace etc. I
have no idea what's going on or how to fix it. Suggestions?