Nofolobricity

are the amps/speakers powered up/unmuted before the desk?if so theirs you problem,always desk on first,once its powered up and happy turn on/unmute your amps,power down in reverse Thank you! I will remember it for the future. I tried it with and without speakers truned on. The result is the same Based on nothing more than it being the first thing I'd look at - that sounds like an unstable power supply 'motorboating'. If you've got access to an oscilloscope you should check the supply rails. But frankly, you need to know what you're doing if you're going to repair it safely and it's not something that can really be talked through on a forum. Dave haha, I guess you mean that the problem is deeper than I thought. Thank you

Hi! I have a Soundcraft SIgnature Series 22 MTK mixing desk. And a couple days ago I've got a problem. Actually the desk works brilliantly. But the turning on process has some troubles. I've recorded it on my recorder: https://drive.google.com/file/d/1jiHgwkbs23-YlgrN1GKvL0OS3vMaGZVM/view?usp=sharing 5 second: I'm plugging the desk into the socket. 24 second: the background noise is starting 31 second: I'm leaning my microphone against my speakers 50 second: the loudness is increasing and the pitch of the background noise is decreasing 1:12: the desk is finally turning on Could it be repaired? May be would you recommend me how to repair it by myself? Thanks in advance!