Guys I dont know if this will help at all but it just worked for me. I found a fix on another forum that rebooted my machine, I lost my recorded programmes/series links etc but at least my box is working again.
"1. disconnect the power from the box
2. reconnect the power to the box
3. at the same time as you reconnect the power, press the front-panel standby button repeatedly
N.B. the amber light will stop flashing and appear 'steady' quickly after this
4. as soon as the amber light goes steady, press the following sequence of front-panel buttons in brisk succession:
Up, Down, Left, Right.
This invokes a BIOS level HDD re-format and has - as I say - always worked for me. You still lose your content I'm afraid but it's a bit less bother than taking it apart. "
If this helps one of you sort out this ridiculous box for one night, its worth posting!!
Good Luck all, til the next time it breaks again...
xxxxx
TechGirl, May 2009