Hi, my name is ***** ***** I will do my best to help you today. To make sure I don’t miss anything, please give me a minute to review your question.
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Can you use multimeter to check volts/ components and do the soldering work to replace parts on circuit board?
This info will help me to assist you accordingly.
Sorry about delayed reply because of different time regions I live in, replacement main board part number for this player is Kenwood J70-1360-11 but it may no longer available because of player age, however, it can be repaired on component level by local technician, this kind of problem occurs due to loss/ failure of -36V supply line and few parts such as transistor Q14, Q15 could be bad. I can provide you schematics of player that will help the local technician to repair the player. Please search your area to get local TV repair shops phone numbers and ask them if they are willing to do component level repair work.
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John, I wish I could do it, I'm in Asia.