All the RAM is back in and all of the logic LS chips, the test still fails all of the RAM & the two customs!
My logic probe hasn't arrived yet (useless seller took nearly a week to even dispatch it!).
Slightly disheartened to not even get the RAM working as that was all OK when I first replaced it. I've checked each pin is joined on the RAM to each other and it is now, so can only be a track or tracks that go on elsewhere, possible why the customs fail too?
Any idea's anyone? Or which chips to probe (with expected results?) when the probe arrived?