Re: help diagnosing an Apple IIe, please.

[David Wilson <mcs6502@gmail.com>]

On Feb 26, 10:38 am, adric22 <adri...@yahoo.com> wrote:
> The second problem is with the display.  The characters are a little
> corrupted looking.  You can read what it says, but the characters are
> missing parts and some pixels of the characters seem to flicker on and
> off.  Although a few times I've managed to turn it on and everything
> looks fine.  Perhaps it is related to the power supply issue?  Or is
> it a bad character rom, or video chip?

I would certainly fix the power supply issue first.

It could be the chargen ROM or the shift register that serializes the
output from that ROM.

Are Lores/Hires graphics also affected? On the IIe the graphics are
also in the chargen ROM.