Just a quick update on this board.
I'm keen to test out the repair but need to sort a few other issues first.
There were a couple of transistors missing/damaged on the board as well as an obviously broken capacitor, so all of these were replaced.
Next I removed the existing sockets for the PIA chips as they looked a little worse for wear. The solder pads were all cleaned and sanded lightly.
The 40 pin interconnect header was the next to go. These things are a real pain to remove!
First I cut and removed the plastic surrounds piece by piece, before desoldering and removing the pins individually.
The last picture shows close up, exactly why these connectors must be replaced.
