Hi Divad,
Your problem is the main tuner board. You may visit the link below for the replacement.
http://shop.ebay.com/i.html?_nkw=LG+37LC7D&_sacat=0&_odkw=Pt-47WX53&_osacat=0&_trksid=p3286.c0.m270.l1313.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
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