This problem, really need to be on a bench to test.. FREE at any good cb shop, to tell you what is wrong.... But most times when a freq counter is not working. Either the crystal is bad, poorly soldered, or its not receiving an input signal. Best way to test is to have a second freq counter external inline using coax.. and check the output of the radio and see if it shows correct or wrong. If it is showing correct they you internal freq counter is messed up. and needs to be check for a bad crystal or solder joints. sometimes even the voltage regulators go bad.. If it is showing a wrong freq on external counter then check the radio's crystal and oscillator circuit. this too can be as simple as a cold solder joint. on the solder side check the small surface mount diode near the PLL, next to the PLL shielded covers. It is normally black these come loose often times too. If you need more help feel free to call or text for more help.