[Elecraft] K3 push buttons no longer workin

[Keith Trinity WE6R]

It is probably a bad encoder. Leaky pushbutton disrupting the switch matrix.
To confirm, try the switchtest in the config menu.
If switchtest is OK,  some modes don't allow you to change the width, 
try SSB I believe.
If it is the encoder, replace all 4. If it is an older radio, send it in 
and we can do it, and there are a lot of updates and optional upgrades.
Keith WE6R