aye something dodgy goin on inside the machine. on dells usually beeps mean something is wrong with the memory, so im gonna just try taking evrything out and putting it back i n again. think your right could be something to do with power supply. cant see it being the cmos battery all bios settings time etc are fine. its weird. computer switches itself off too when im switching between 3dsmx photoshop and Reality. ran diags on the fan and processor. they all passed.
do i still owe you pints if i cant remember the night haha. i havent drank since ;)