I would like to say hello :)
I have a problem with apple iie. I have this image on the screen.
I checked the power supply. The voltages are correct.
I checked the capacitors. There are no short circuits.
Using the TL866 programmer, I checked the 74xxxxx circuits
The test failed: 74F09,74F10,74LS175,74LS74.. I replaced
The replacements pass the test.I replaced the processor pulled from the 1541 station and two from aliexpress ... no changes
I connect the computer with and without a keyboard.
I tested the RAM with the arduino tester :) three bones are damaged ... I replaced the whole set.I reprogrammed video rom.I replaced 341-0170 (managed to buy it at a bargain)I'm running out of ideas.