We're putting a security code in there, yes. There's nothing visible I'm afraid, but pulling the unit and putting it in the trunk is a good deterrent: nothing to see, nothing worth stealing.

Out of warranty there are ways to fix a unit - eg, board swap - but it's not commercially viable to repair boards with a lot of surface mount. The chips won't go faulty - and if a connection goes, then it's just as likely to be anywhere, including within the 8-layer PCB "sandwich".

Noone repairs electronics anymore - everything is too high density nowadays. If your PC goes wrong, it's usually not the CPU - it's the main board. All you keep is the CPU, you just toss the mainboard as it's not practical to repair.

As for high temperatures: our sensor works at both ends, in that the unit won't spin up the drives if it's over 55degC (131F). Turn on the A/C for 5 minutes :)

Hugo