Mackie Srm450v2 Srm V2 Active Speaker Srm450 12 PA New "changing freq" Questions

I have Mackie SRM450v2 speakers, one has no power, I think the fuse has blown, it it possible for me to change this myself? The manual says it's not user serviceable. Chances are if the fuse has blown

My peavy escort 1500 keeps shutting off but will come back on if I turn it off and on is it a fuse? Need to know if there are fuses.can I change it to fix this problem Can't be fuses, as it comes back

changing the data and having to recalculate on the fly and doesn't mute itself while doing so which results in "garbage sounds out". The bypass setting should NOT get any tone UNLESS you have feedback

...freq.) but no solution please help...... try changing frequencies, also make sure that the mic and the reciever are on the same frequency, what it sounds like to me is that it is set to the adjacent ...