So today, after never having an issue with it in my life, my head just stopped working on the dirty channel. I'll turn it on and it'll start working as normal, for about 15 seconds, then it goes quiet and its volume is either next to inaudible, no matter how high i turn the volume nobs, or i'll play and just get static back.

Anyone know what it might be? Hoping it's either an easy fix or nothing too expensive.
Vash_15 Have you registered the amp for the warranty? Or at least had it under a year? Orange is good at honoring their warranty.

It could be the fx loop. Try running a patch cable between the the out and in of it.

Has the amp taken a tumble? It could have been damaged.