Hi Jason,
I have a sick 2/10. When I push the power button, there is a 'whump' ...
definitely your Switching Power Supply is weak, or your Lisa has somewhere a
high consumption unit, which leads to that symptom.
The Whump comes from the PSU trying to power-up, but immediately shuts
down due to a
Jason,
I have a sick 2/10. When I push the power button, there is a 'whump' from
the speaker, the diskette drive motor spins a little, and that's is. No
lights, CRT activity, nothing.
Seems like others say this is a power supply problem or an over-current
problem.
In case the schematic for
David, thanks VERY much for that schematic. I had been searching and
searching but could only find the one for the 1.2a unit.
I have tried powering the Lisa with the drive cage removed, same result. I
also tried unplugging the CRT board, same result, except that the whump was
louder. I also
Hi Jason,
your search to find the error is going on.
I have tried powering the Lisa with the drive cage removed, same result.
I have not tried powering it on with the ram cards removed. I'll try that
now.
Check that first, before we take a closer look to the PSU
... third pin from the yellow
Ok, I did some more troubleshooting.
I removed the drive cage. Thwump got a little louder.
I removed the RAM cards. Thwump got a little louder again.
Removed the CPU card. Thwump got even louder.
Removed the entire card cage. Nothing happened when I pressed the power
button. I would assume this
