I picked up a Kenwood TR-7800 at an estate sale. It appears to be fully functional (well it doesn't have a tone card), except the frequency display and channel number displays are displaying numbers with missing segments. I can scan up and down and the display changes, but mostly garbage The actual 7 segment displays are working, it just isn't getting the correct information between the processor and the display. Any have experience with an issue like this? Ideas and where to start?