5 Jul
2019
5 Jul
'19
11:55 p.m.
<snip>
Aside from the chips/sockets fix, verify that the keyboard light comes on.
If the bulb is dead the system will not boot (someone can "2nd" this).
Verify that the keyboard reset key is not stuck. Overall I'd find a
working system and compare/contrast voltages at key obvious points. Verify
your boot media and disk drive are OK by comparing with a known-working
system.
Where are you located? Maybe someone near you can offer to assist.
Bill
Looks like this:
https://share.icloud.com/photos/0NHNkEG9ssPsi65ojivBteKaQ
Does this failure mode ring any bells? Obviously the video signal is
being
generated well enough to sync a composite output.
Any idea whether I
should start by replacing the CPU or the ROMs?
<snip>
The Apple /// is infamous for having chips work their way out of their
sockets due to heat, so you might start off checking for that.
-- Jecel