Marshall RF-1 debug & fix

[Overdroid Design]

Hi guys, first post here.
Does anyone have any diagnostic expertise on the RF-1? I have recently broke mine and was wondering if its fixable and what part of the pcb to tackle.
So basically it had too much current put through the jacks. Instead of the insert from my amp the Y cable got inserted into the extension socket. Yes, silly move. I'm guessing the load totalled any kind of input buffer. The pedal still powers up but not signal is passing through as you'd expect.    I can't seeing it being an easy fix but would sooner have a crack than toss it for parts.
Cheers for any help, especially in the form of photos of said board with likely caps and such marked.