@scuzz
According to my old manual for the A500 (not the Plus), U12 is just an octal buffer between the CPU and the internal video bus. In the A500 it was a 74F244, but I see in the Plus it is a 74LS244 (lower power).
It's a pretty bog standard chip that you can buy at any tech store and replace yourself if you can solder and desolder.
_________________ cheers tony
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