Re: 1977 original apple II restoration (continued)...

["schmidtd" <schmidtd@my-deja.com>]

I had a different kind of video problem with a board of mine.  But like
you, I saw some real characters.  So I figured the video circuitry was
good, so was character ROM, so was at least some memory, and the CPU
was probably ticking too.  I also went through the process of swapping
and testing each and every socketed IC.  No dice.  Mine turned out to
be one of the transistors - the 3904 between A and B, 12 and 13.

I'd replace the transistors on the board.  Desolder and solder in new
parts.  You can get them from Radio Shack or Jameco.