As my pcb's are en route to CDJump, I thought it might be fun to try to predict why the boards are currently dead. Here are some preliminary steps I had taken, to weed out poll options:
1. I replaced the ribbon cables
2. I replaced the Z80A with a known working one
3. Removed and reseated chips
4. Installed AS power supply and adapter
At present, board displays nothing but 2 small green pixels on the lower right side of the screen.
What is your prediction on where the problem lies? I can't find a way to do poll buttons so sorry.
1. I replaced the ribbon cables
2. I replaced the Z80A with a known working one
3. Removed and reseated chips
4. Installed AS power supply and adapter
At present, board displays nothing but 2 small green pixels on the lower right side of the screen.
What is your prediction on where the problem lies? I can't find a way to do poll buttons so sorry.



