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The power supply board of the television is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
Hi, 10 times red light blinking shows problem with PA board and/or H board, both boards are available in shopjimmy.com for $35 and $45 Replace required board to solve this issue. Hope this info will help you. Thanks.
Panasonic said "A" board, A board SOS Detect (Explanation) 10 Blinks SOS: The voltage regulators IC5400 and IC5401 in the A board generate SUB9V and SUB5V. The 9V and 5V from these ICs are monitored by IC1100. Any abnormality on the SUB9V or SUB5V lines, triggers the shutdown circuit and the MPU shuts down the unit. The power LED blinks 10 times. But need to measure the connection SC2, if it short, it will be the SC board. The knowledge obtain from: Real case of repair by myself. Information from Panasonic training manual.