I run a MB Blackline 250 through a MB 4x10 cab for three years now and have been running into an issue lately that I haven’t experienced before. My amp turns on fine and all my cables seem to be in decent condition but I’m not getting any sound until right when the amp powers down. It seems to start working fine after being on for 5-10 minutes but I’ve never had any delay like that before. my drummer, who works with electronics professionally, can’t find any noticeable issues on the circuit board. Has anyone experienced this issue before and could offer some tips to get my rig working properly?