No doubt a bad connections problem somewhere but where?
Internally, there are several small relays as well as leaf/microswitches for on/off hook. It didn’t take long to determine that one of these microswitches was at fault. Under the lever operated by the handset is a bank of 3 separate microswitches. Two of them seem to be fine but the other would appear to have burnt contacts. In an ideal world, I would hunt up a replacement – and of course there would be a service bulletin on a modification to prevent the same problem from reoccurring – but this was not to be. Instead, I carefully unsoldered a pair of the microswitches from the circuit board and popped the top off of the bad one. After cleaning the contacts as best as I could, I replaced the original switches swapped in position. (Unfortunately, I also ripped a couple of pads off with the switches so this complicated the reassembly slightly.) This did restore operation for a couple of years. I knew I shouldn’t have passed up the same model phone at that garage sale! It would have yielde
