HI,
I had a similar issue with my printer. the LCD read gibberish and then I would press the encoder and it would resolve itself. Now the LCD has stopped working altogether. I tried some mysterious combination or resetting, powering down and reloading firmware and got it to work again, once, but now I can't remember what I did and it had blanked out again. The LCD will light up and it does make sounds when I press the encoder but it doesn't display any text so I can't get it to run through the set up protocols. I hope the board is not burned out.
any ideas?