Hi, I have a 7-year old JVC tv (model#: AV-2749S, serial#: 17417631) where the sound does not work (even when volume is up to max) when my antenna is connected to the tv. Also, the picture turns off when the tv is slightly shaken or moved. Do you have any "fix it" tips I can do at home? If it needs to be serviced professionally, do you know how much it might cost? Thanks!

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