[Kenwood] R-820 display problem

[Mike Steussy]

Ahoy! My R-820 has a problem that may be common to TS-820s and perhaps 
other models. When I tune the radio, the least significant digit of the 
display (.1 x khz) shows only the numerals 8 and 9, and is otherwise 
off. This problem sometimes goes away after the radio remains on for 
several hours. Then all numerals display normally as I tune across the band.

I have tried removing and (after inspection) re-installing the display 
boards with star lockwashers, applying De-Oxit to the pins of all 
circuit board connectors (helped with other problems, but not this one) 
and installing star lockwashers elsewhere in the receiver to no avail. 
While it’s not a problem that would keep me from using the R-820 on the 
air, it is annoying. The R-820 service manual doesn’t cover this 
symptom, so I have no idea what could be causing it.

Please advise me if you have insight on this problem.

73, Mike Steussy AE4R
Vienna VA