Home Theater Questions? Ask a Technician for Answers ASAP
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, have you considered / tried a RESET ?
That a RESET was not corrective is very significant as it would be pointing towards an internal hardware issue.
If comfortably able and feel safe to do so, are you then considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even a soldering iron?
There were two (2) Service Bulletins that may be directly addressing your described symptom. These documents were provided to Service Technicians with description and illustrations + corrective instructions as part of the Service Manual.
Would electronic copies of these Service Bulletins serve your purpose please?
Please click HERE. (limited time download link)
The Service Bulletins are in a Portable Document Format (PDF) file and can be viewed in most web browser. Click on the link to open the file or right click then select “Save As…” to download the file. It would require Adobe Acrobat Reader or equivalent for this purpose.