It's not mine, but a friend of mine bought a used Kustom 212 combo bass amp recently.

After about two weeks of not much play it has crapped out. At first he thought it was just the speakers, but last night he plugged in to show me the sound it was making. Only this time he discovered something else was going wrong.
It did sound like the speakers may have something wrong, but it was making a strange buzzing noise and clicking like some electrical component trying to fire up.

This is about as much as we know so far. Neither of us are very technically inclined. Any information will be of help and is appreciated.