A friend has just called to tell me that his 'Sky HD box' has gone
faulty. He said that he thinks it's the power supply - something in
there on a heat sink is cooking up.

He lives about 60 miles away, so I won't be able to look at it for a
while. As I've never seen the inside of one these things, I have no idea
what to expect - or even if they're repairable. Anyone got any ideas/tips?