A1200: now a PSU issue...

[Doobrey]

Karlos wrote:
 If the fan is slower I'd expect the 12VDC line to  be low.

Or the ground could be high  :-o

I'm scratching my head on this one, but since it all works with the a500 PSU I'd point to the re-wiring job.
 Maybe something silly like the +/- 12v lines swapped, or a bad ground connection.  Is the audio output distorted when using the ATX with no Apollo?

I was thinking about the +5v being low on the LED, but then remembered it only goes bright when after it's passed the startup checks in the ROM...which points to the CPU not working...which only confuses me more
 :-x

[Doobrey]

Never trust wiring loom colours..
I just double checked on my mini ATX, and its PS_ON is purple, but according to the ATX spec it should be green :pissed:
 Since my A1200 is laid bare on the bench with it's top casing off, I just stuck a simple toggle switch between PS_ON and GND. I dare say when I bung it into a proper case I'll use something like the circuit on Stedys site to use a nicer non-latching push switch.
 Thinking about it, I might use a PIC to replace the debounce and flipflop, with the added bonus that it could time the duration the switch was held in and do a reset if it was held for >2-3 secs, or even have an input from the miggy for a soft power off too..
But now I'm waffling out loud and not helping at all...  :insane: