Hi, you seem to get getting through these Zeniths at a good pace. At least servicing and access is easy. It seems those pots are the biggest headache with that chassis. I've struck that phantom resistor syndrome before where across the open resistor it reads roughly the same... But having the identical resistance would have been a pain though...
These things are sent to try us....
.. This chassis looks like its coming back to life
Cheers Glen