Hello marshall forum! First time posting here! I just bought a new dsl20hr and within the first 20mins of playing on full power it started to lose power, started cutting out. Turned it off and back on, worked for a while again. I tried the low power mode and first there was a loud(ish), louder than normal, electric buzz from the amp itself and it had very low, pretty much no output at all. Also on the full power mode it made crackling and popping noises through the speaker cab when guitar vol was turned down all the way. I did the tap test on the tubes with a drumstick and didnt get any rattling or other weird noise through the speakers so I guess the tubes are fine. Not a great first experience with owning a marshall... Edit: I lied! Somehow I forgot that I play a dsl1 with two 10” marshall cabs at home, used to own a mg15h beforw the dsl and a few years ago bought a valvestate combo second hand..it didnt work...worked for a few mins at a time and then cut out completelly. Sorry about that... I reached out to the store where I bought it, lets see how they handle it... Anyone else had these issues with a new dsl? What might be the cause?