I’ve had 2 out of the last four 101ZD radios... have similar issues after sitting around unused for too long.?
Get some decent switch cleaning spray like Deoxit D5.
Turn the radio face up and on it’s back.
Go over to your attenuator switch and flip it down.?
Note there is a very tiny space behind the lever and at the thin felt dust cover where you can open it a bit with a needle.
Then push the Deoxit tube into the crack behind the lever bat and squirt a shot the Deoxit into the switch.?
Flip the lever up and down a dozen times and leave it in the up position.
Now do the exact same thing again with the switch up and use the needle again to move the felt dust cover a bit and shoot some Deoxit in again.
Flip the switch up and down another dozen times or so.?
There is a good chance you’ll actually get a few drops of Deoxit in the switch and clean some crud out.?
Now reconnect the radio to your antenna and power.?
Find a band that should be active and adjust the RF gain to max, volume up a bit and tune the preselector to max background noise and listen around the band to see if cleaning the attenuator switch helped.?
Bruce Collins