Driving along today, took a bend and clunk, the empeg cuts out. Remove and replace it in the sled and it fires up again, so fine I thought, must have not been seated properly.

Five minutes later, same thing happens again - except this time it doesn't come back. Neither car nor AC power get any response out of it - hard disks dead, no display power.

Nothing obviously loose inside, nothing that could have caused a short circuit.

Help!