On Sun, 18 Jul 2004, Jules wrote:
> Machine A shows signs of life - the disk drive light comes on and stays
> on, with the drive spinning forever. The display shows an alternate
> pattern of black and white pixels, apart from a run of about ten pixels in
> the centre-bottom that are all black. Occasionally if I power it up I get
> random cycling noises out of the speaker, and/or coloured garbage on the
> Hitting reset shows no sign of doing anything.
Sounds like the PLA chip has died. Ray Carlsen has just repaired
two SX-64's for me, and both had the same problems and the same solution
-- PLA replacement.
> Machine B is totally dead - no sign of life whatsoever. Other than
> checking the fuse I haven't done anything else, but before I spend hours
> digging around in the PSU, is there a common fault with the power supplies
> in these machines?
I can't help you with this one. Raj Wurttemberg or Ray Carlsen
would know better.
> Any ideas? Oh, and just to be sure, I can expect a correct display without
> a keyboard necessarily plugged in, right? (it's easier to work on the
> bench without the keyboard getting in the way!).
Yes, you don't need the keyboard for it to display (unlike a PC).
Fresno Commodore User Group