Hey so I bought my Line 6 DL-4 a couple of months ago used from reverb. When I first got it it worked like a charm and I had no issues. As I kept using it I would save some delay presets and jam with them for a while and then use the factory reset to erase them so I could keep exploring all of the possible effects. Well after a couple of months of use I went to yet again factory reset it by holding the A and the D buttons with the guitar input unplugged. The DL-4 would flash the lights as if it had been reset but none of the presets are erased! If I am missing something or anyone has any ideas on what I could do to fix it that would be great!