Greetings!

Oh. I read in flat mode - I was actually responding to Stig's problem, which is similar to what I had.

In your case, I suspect the hard drive cable connections or some other hard drive error. Tony's links to the hard drive diagnostic section of the FAQ are more likely to help you. It is possible that the temperature differences between the car and the desk are enough that it will work in one place but not the other. You might want to doublecheck your drive cable to see if it is loose and visually inspect (with a magnifier) the IDE header on the mainboard to see if there is any sign of the header pulling away from the solder / pads (dry solder connection).