Hi,
I posted a bit ago with some CRT issues and 5v/12v issues. Another Mac has been (mostly) liberated by changed TDA 4605, DP6, CP23 and the zener diodes around TDA4605.
Now I am getting the error code pictured. I understand it is a RAM bank failure in Bank B but I’m not sure what the 0400 in the bottom row means. I also don’t know which RAM chip is represented by Bank B. This error appears with or without the memory expansion installed.
I have recapped both the analog and logic boards and any and all electrolytic leak was neutralized with vinegar then rinsed with IPA.

I posted a bit ago with some CRT issues and 5v/12v issues. Another Mac has been (mostly) liberated by changed TDA 4605, DP6, CP23 and the zener diodes around TDA4605.
Now I am getting the error code pictured. I understand it is a RAM bank failure in Bank B but I’m not sure what the 0400 in the bottom row means. I also don’t know which RAM chip is represented by Bank B. This error appears with or without the memory expansion installed.
I have recapped both the analog and logic boards and any and all electrolytic leak was neutralized with vinegar then rinsed with IPA.

