Please help me...

My Zoom G5 unit was fine until I turned it onto day and it made a strange cracklings sound and won't work with any guitar. It is definitely the unit itself and not a guitar, cable, psi. Everything works on it except the signal from the guitar. It doesn't wor with headphones or any amp either.

Please, please help me!
My Two Piece band's Facebook https://www.facebook.com/TerrorpinBand

I just like to imagine that my neighbors enjoy their free, nightly concerts.