Originally Posted by henryjurstin13
Possibly try factory reset??? You'll lose presets, but it might be helpful in working out a bug....
To do that simply press and hold the Channel A Button while turning on the amp.
If you don't already have one, download a pdf file of the owners manual from the Line 6 website and review the memory/channel settings information. I bought my LD300 Pro new 5 yrs ago and sometimes referring back to my manual helps me clear up issues like the one you're experiencing.