Recently my pod 400 foot switches dont come on and inoperable. The only way I can select my presets is to manually turn dial by LED. This ofcourse defeats purpose of stomp box features. Also the tap switch to select mode to tune guitar doesnt come on. It seems like all the switches/pedals on lower portion of floor board dont work.
Any suggestions/ideas what's ausing malfunction?
Sounds like a power supply issue. Have you recently introduced other components (amp, pedals, DI boxes, etc.) onto the same power strip or outlet? You may have even plugged something in on another outlet in your home but it still could be the same circuit which can cause problems. With the hot summer maybe you've moved an AC unit or fan onto the circuit.