Hey guys, Super new to the forum. I just picked up a Marshall MG250dfx on CL. I know that this amp isn't very popular/isn't well liked, but it suits my needs right now. Anyway, it worked fine for a little while, but after I played for 20 minutes or so, the sound dropped to point where I can barely even hear my guitar with the volume on 10. I know that these apps can have problems with the fans, but I don't think the issue is overheating/fan issues because I took the amp apart and exposed the electronics directly to the air and waited an hour after this happened, and the problem persisted. Wondering if anyone has any experience with this issue, and if so, what you did to fix it, besides replacing the fan. And possibly where you got the parts. Thanks in advance.