Apple //c--Uh-oh!

[dalloff@freenet.columbus.oh.us (Dave Althoff)]

Uh-oh!

I have a "ROM $FF" //c.  And it has been acting a little flaky.

The net.wisdom was that I had one or more bad RAM chips.  Okay.

So, over the weekend, I carefully desoldered all eight of the main-bank
RAM chips, installed sockets, and replaced the RAM (well, I had to...I
damaged or destroyed most of the old chips getting them out...)

Trouble is, in extracting one of the RAMs, I managed to also destroy the
small yellow part, presumably a capacitor or diode, identified as "C8" on
the board.  8-(

Question:  What is this thing?  What value is it, so that I can replace it?

As I am a brave person, I powered up the machine anyway.  No *BEEP*, but I
got a screen full of hi-res graphics that looks like a bunch of green and
purple "A"'s.  This is worse than the machine was before I started surgery.

I'd like to replace the part I damaged first, then see if that fixes the
problem.  If it doesn't, then I guess it is back to the drawing board...

--Dave Althoff, ][...incompetent ][rosurgeon...
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