Ni-Wumpf Gottlieb System 1 CPU
This board came out of a pin that I purchased. The seller told me that one day it just stopped working and he let it sit dead before selling it to me.
I don't do board repair work, it could be an easy/cheap fix to get it working, I don't know. Overall it looks in good condition, they never had a battery on them, so no acid damage. It has an auxiliary ground line attached, it looks competently done.
The LED is staying on. Ni-Wumpf has the manual posted for this CPU on their website and it lists the possible likely causes for the LED to be locked on, it seems like a pretty comprehensive and well thought out diagnostic plan to solve the problem.