This looked like a hard drive problem, so I replaced the 500gb with a new 1tb, re-assembled, with the Snow Leopard disk in the superdrive, and switched on.
Same again. Nothing. The superdrives whirrs, for a few seconds, and then all is quiet. Screen is blank... etc.
The disc stays in the drive. In order to get the previous disc out, I had to take the superdrive partly apart...
I'm looking for some way to move past this, and try and detect the problem. But I'm not very techy...but I can follow instructions and replace components.
So.. what's my next step?
There are four status lights down near the bottom.. the lh one is on, when the machine is switched off...switch on, and the leftmost 3 are on, with the 4th one off.
If I've asked this in the wrong section, perhaps someone could advise me the correct one?
if I can supply any further info - just ask.. I'm a bit of a novice at this, but I'd rate myself as a "capable" novice...! :-)