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, the described symptom almost always point to an internal hardware issue or more particularly, most likely suspect after a review of the Service Manual would be the ouput stage circuitry.
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?
Equally important, could you make use of the schematic diagrams or better yet, the repair/Service Manual?