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The T-con board controls the picture elements on the screen. Usually replacing this board will solve the problem. If you can touch the screen and the lines disappear and later reappear, that says the screen itself is defective. The only fix is to replace the entire screen.
http://www.go-gddq.com/upload/2009_03/09032313026620.pdf www.scribd.com/doc/.../Sanyo-TV-LCD-Training-Manual www.scribd.com/.../JVC-LCD-FLAT-Television-LT26WX84-Service-Manual www.scribd.com/.../282-29-JVC-HD-ILA-Basic-Model-Training-2007 These service and training manuals above show you how to troubleshoot and isolate any problem, and what to do about it, please have a look and download and use all the information, in the manuals and you will soon isolate your issue.
Please press the WIDE button on the remote repeatedly to remote the Bands. If the issue persists, you may need to change the Aspect ratio to 4:3 on the Video source that you have connected to the TV. Check the link for more info:
http://www.kb.sony.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=C308757&sliceId=1&docTypeID=DT_KNOWLEDGEARTICLES_1_1&dialogID=130649210&stateId=0%200%20130647809
sounds like you have some lines of dead pixels, is this an LCD screan or a plasma screen? if it's LCD then it is dead or stuck pixels, check your owners manual and there should be a section on stuck pixels if its and LCD tv.
The screen itself may be damaged. In any case, the set will be exensive to service. If the set is under warranty, it is best to give in the set for service.
Your problem is a bad main filter, a regulator IC ,and or a combination of a convergence problem along with a vertical IC going bad. This set is not something you should mess with unless your a trained tech. Please seek a pro to assist you with this repair. good Luck
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