Sansui G-7700 Incorrect frequency

Symptoms:

  1. The dial pointer does not correspond to the correct frequency.
  2. The digital readout has no correlation to the dial pointer.
  3. I can bring-in stations no problem, good audio, stereo light is on, quartz lock led is on in presence of strong clean signal.
  4. I can vary the frequency but it will only go as low as 90.5 Mhz (when the dial pointer is at the lowest far left).
  5. I tried swapping the MSM5540 (from a Sansui spare) & did not make any difference.
  6. I tried swapping the Quartz & did not make any difference.
  7. I know that these G-series have known issues such as described.