I try to reach service menu on my new Panasonic Plasma TV TH-42PV600. I accidentaly came to self check , because I press 'I' button instead of "Index" on remote controll. I activate Self Check. In self check menu there are no settings. After power off and on , I have to set TV memories-channels again. The problem is that I dont have sound on TV channels (analog). Picture is OK but I dont have a sound. I hear only noise with weak sound in the background. The same is on all TV channels. Now I know how to access Service menu , but I dont know how to set OPTIONS 1 to OPTIONS 13. Why is something changed if I only access self test menu. MY OPTIONS IN SERVICE MENU 2 OPTION 1 4F OPTION 2 11 OPTION 3 3A OPTION 4 D9 OPTION 5 2B OPTION 6 AB OPTION 7 00 OPTION 8 78 OPTION 9 00 OPTION 10 80 OPTION 11 43 OPTION 12 20 OPTION 13 20 Please HELP me!