Hi I'm having a problem with my 3 year old UNICO CDP, bought 2nd hand on March 2006. When switched on, everything works perfectly, (display, disc spins etc.) but no sound is produced through the spks......the problem resolves when the unit is switched off and on. At 1st this occurred infrequently, but now it is increasing in frequency to almost everytime I switch it on. The amp, cables and spks were bought brand new. Does anybody know what the problem could be? Many thanks.