Hi, I have bought a Cyrus 2 and PSX (TOG version) up at a car boots. But when I switch it on the light comes on, but I get no sound, no crackles, nothing on any input. I have down load the service manual and read some threads and they indicate that were is some internal fuses. So before I open up and have a look about, is there any key things to check first? Thanks for any help