Early HP35 PCB with 2.02 bug question

[Harald]

(11-18-2016 11:25 PM)jebem Wrote:  Hypothesis 3: Over-clocking/under-clocking. Can you tell if the speed is the same as the original PCA?

There is a clock driver in this PCB, but the two phase clock is generated om the display PCB by the anode driver. So the frequency is set there.