Hey Clyde!
Check the resistance of your squelch control, from one end to the other, across the two outside lugs.
Power off, and the power-supply filters bled down first, of course.
You may want to turn it first to one end, then the other while the meter is connected. Make your reading with the knob turned to get the highest reading.
If it checks much more than 10k ohms, this can foul up the ping, even though the squelch control still appears to function like it should.
Not sure why they fail this way, but it's the easiest thing to check first.
73