This guy has been interesting. A computer of sorts from 1980. Removed all the boards and started replacing tantalum capacitors one by one. Once the big values were replaced each board came to life and finally the screen came on. The voltages also were correct. Next step is calibration and try to pass the self test..
Chris and have been working on this guy off and on for a while. There is finally light at the end of the tunnel. Here is a pic of the ancient guts.
With these boards removed we get all the correct voltages. Not so much when they are installed. I started replacing all the orange tantalum caps… Lots of caps.
Fortunately with the input board removed there are some signs of life.… Read the full article