ME-70 doesnt let me use certain effects

[Danzebar]

My pedal is in good condition apart from a couple of detrimental things , I cant select the loop station anymore(the one effect I use the most) or the delay on the modulation pedal despite the knob going all the way it seems to skip or not register that I've changed the setting or turned the knob, the preamp also doesn't go to the rectifier option and the treble seems ro have a mind of its own and changes frequently , the expression pedal jumps between the two whammy options when I have one selected .it seems I cant send it off as the warranty has ran out , anyone know how much it should cost to repair or how id do it myself?

[The Dude]

Are you using the correct power supply?

[Enzo]

Sometimes when something on a unit like that is not working, it is because something else is. The first thing I'd check for would be some control button stuck on.

Bare the board and see if any of the little tactile switches under the buttons no longer click.

[doctor]

Try to perform factory reset (page E-16 of the Owner’s Manual).
If it will be without success, let me know.