My mate has just bought an Old Sony H/Cinema system from me. The Amp (Model STR-K5LSO) now has along the display "UNLOCK". I sold it to him with no instructions and have never came across this once in the time I owned it. It is preventing him from hearing anything through the amp be it from the Optical or the 2 phono connections. Tried going into the menu to see if it was something obvious but I havent a clue and it could be staring me in the face.I tried Sony a week ago and have never heard from them, must be really old then!Any suggestions? Thanks
Further to this, from what I can remember it is from the HT series of H/C kits. The speakers have a beech wood finish. The Dvd player is from memory either a DVP-NS30 or a DVP-S335, if this helps any.