I only occasionally use this table which I find great, but this morning while doing tests I noticed that 2 effects out of 4 no longer worked: the 2nd (the second reverb) and the 3rd (doubler, chorus, etc ..) only 1 and 4 work (reverb and delay) A repairman advised me to reset the table but I lose all my settings. Has anyone ever had this problem? Thank you for your reply.