A Galaxy 88.. start looking for poor solder joints. Mine had dozens. No Tx, No RX, default freq, no meter, intermittently working.. I went over it with with a spool of solder and a fine tip iron and retouched the solder on everything I could get to.
I was shown a trick of using a plastic ink pen casing as a probe and start pushing on solder joints with the power on. You'll find issues that way. even a light flexing of pushing on the board in areas narrows down issues.