I've got a system 80b board that wasn't booting. It had a battery leak a little bit. I cleaned the corrosion off and there didn't appear to be any significant damage that I could see after cleaning it so I decided to try using the test rom to see if it would work after cleaning only.

I've attached a video below of the board booting using the pinitech adapter and the marco rom. The instructions for the rom are at https://www.pinitech.com/docs/sys80_univtester_marco_instructions.pdf

The board seems to do the 1 long flash, 1 short flash, 2 short flashes, 3 short flashes, and 4 short flashes as it should. It then seems to loop back and doesn't seem to do the IO tests. I've looked at PB0-7 on U4 and they are all high instead of being low like the instructions say. I also looked at PA0 on U6 and it was high as well and not pulsing.

I guess my question is what should the rom do after the 4 short flashes. Should the LED stop blinking at that point? It shouldn't look back through the initial memory tests correct? If that's the case what could be going wrong here?

I removed the eprom from PROM1 just now and it now goes into the IO test as it should. I was under the impression that I didn't have to remove that and only needed to do the jumper. Thank you for the help Marco and thank you for your work on the software.