Dead HP 35

[krazyk]

I need to check for clock signals next because it occured to me that without a clock signal there will be no life to this digital circuit. No life translates to no current I am guessing.

This appears to be the case here really. I collect computers of the late 70s and 1980s so I will check the other compnents for open circuit. The 4 transistors seem to check out using the diode test method and the voltages are 90% of what they should be.

Will see if I can post some DSO images of any clock waveforms. I am betting there will be ZERO.

Kris