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Hi Dave, Troubleshooting circuit boards to the component level has become a bit harder due to the availability of semiconductors.
I would suggest to measure all the voltages from the power supply at P802 and P803.
Let me know if you require further assistance or I can send you the service manual if need be.
Hi, I friend of mine did the same thing.
I can't tell you where to get it repaired but I can tell you what I found.
After taking the cover off and removeing the screening can I found a
diode had popped it's cloggs. Split open.
It's just by where the power cables connect to the pcb.
It's a 1N4004, 16p from Maplins.
I replaced this and the unit now works fine.
Hope this helps.
This series of TVs has a famous issue with the power board (part number MLT166A or similar). Several capacitors and zener diodes burn out causing some resistors to burn as well. If you are capable of doing component level repairs check capacitors on the board and zeners Z2, Z3, Z4, Z5 and resistors around them. If you prefer to spend hundred bucks and simply buy the working power board for it - ebay is your answer.