I have a front end tuner problem on a JVC AV-27330 T.V. Chassis #A110. Dated 2002 and began acting up about 1 year later after warranty.Canadian purchase. It is a thermal problem and affects only the cable F connector input. When T.V warms up, I lose channels 2 to 6, 14 and 15. Shortly after that the remaining channels go, including audio. I used a hair dryer on cold setting in the back of the set which brings back the channels. Is this a common problem? I am a former T.V tech but have no gear now. I can handle a technical reply though. Also, what is the service menu code? Any free service manuals? Thanks.

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