Been awhile since I used mine..
Do you have frequencies programmed in the appropriate banks ? If my
memory is correct there are a 1000 channels in the receiver.
Bank 1 is channel 0-99
Bank 2 is channel 100-199
Bank 3 is channel 200-299
Bank 4 is channel 300-399
Bank 4 is channel 400-499
Bank 5 is channel 500-599
Bank 6 is channel 600-699
Bank 7 is channel 700-799
Bank 8 is channel 800-899
Bank 9 is channel 900-999
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If you have less than 99 channels programmed and you started with channel 0,
and ended at channel 98, then you only have frequencies programmed in bank 1.
and the selection keys on the front panel don't work...