I bought CR820 from ebay. It powered up, relay clicked but there was no sound at all to start with. I Replaced most of capacitors which looked swollen, De-oxidised the fuses, contacts on controls, opened up and cleaned relay. Checked all 4 transistors on side , they are fine, cleaned and re-seated them. After all this work when I switch it on, its dead. I have checked that there is 240v at primary but I can not measure any voltage at secondary, or should I say I do not know how to. There are 2 red + black wire and 2 orange + blue wire. I have measured AC Voltage between red & Black, Orange & Blue but it just reads zero. All these wires are wound to a metal contact on board not soldered. Should I remove the wires before measuring? Can anyone please guide me how to proceed next? Should I just purchase a new transformer?