HP 98035 Clock Module Repair-A-Thon - Part 1: 12 bad boards, how many can we save?

My previous video on TI clock chips was a (rewarding) detour on the road to repair my HP 98035 clock modules. Now that we have a good clock chip tester, and a few Chinese sourced clock chips that tested all good, can we repair the HP 98035s? Well, not as easily as it might seem.

Also, Ken Shirriff has just written two articles about his reverse engineering of the HP Nanoprocessor you see on this board: http://www.righto.com/2020/09/hp-nanoprocessor-part-ii-reverse.html . His work and help was invaluable to figure out the finer details of how these boards work.

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Music Credits: Crinoline Dreams Kevin MacLeod (incompetech.com)
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Видео HP 98035 Clock Module Repair-A-Thon - Part 1: 12 bad boards, how many can we save? канала CuriousMarc