Expert PET advice sought

From: MAY Peter (
Date: 2003-11-05 08:06:13

I'm trying to restore an old CBM PET 2001-8 at home. I need expert advice.
I've gone through the clean-up and reseating the chips in their
sockets phase which fixed a bad connection on a BASIC ROM chip.
The screen display looks something like this:

 []cursor             READY

 It's got me stumped, I have two cursors flashing!
 Keyboard is inactive, cassette motor runs briefly on start-up.
 I was suspecting a possible memory problem, but hoping it was
 sonmething else. 6550 SRAMs have not been made for a long time!

 Can anyone help with a possible diagnoses?

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