I just bought a pioneer sx 1250 that was in mint condition on ebay a little while ago. Today for the first time when I tried to use my cd player connected to the aux when I turned on the pioneer sx1250 it made some clicking noises, something like a lcd tv when you turn it off. No sound came out when i turned on the cd. I switched to radio and that worked ok then phono ok too. switched back to cd no sound. I played the radio for about 10 min and then tried again. No clicking sound and cd worked. Any idea what caused this? I moved my pioneer hpm 100 speakers to 2nd floor in living room. Seems to have lost some of that rich base sound. speakers on floor. Maybe stands would help? Thank you for your advice. Sincerely, Shaun