Tip & How-To about Philips Magnavox 50ML8105D 50" HDTV DLP TV
You try to turn on your Sony TV and nothing happens. Then you notice that the standby light is blinking. Counting determines that it is seven blinks about a second apart followed by about a three second pause.
Your problem is that the B+ (high voltage) is over the normal maximum value. You have a problem in the power supply regulation and horizontal circuit. It more than likely is a bad solder joint. Solder all the connections in the high voltage area. This is the area around the flyback transformer.
The flyback looks like a can and is at the rear of the TV in a Sony. It has large red rubber wires comming out of it. One of the wires is connected to the CRT near the top.
If this does not solve the problem I have a tip at http://www.fixya.com/support/r4916851-diagnosing_repair_tv_high_voltage which should be helpful to troubleshoot the problem.
If you cannot locate the problem or do not have the necessary troubleshooting skills a better plan may be to purchase a new circuit board.
Fortunately these days circuit boards are not that expensive. I would recommend replacing the defective board. The board with all the power supplies in a Sony is generally the "A" board and contains the High Voltage power supply.
Two of the best places to get the board are http://www.encompass.com or http://www.shopjimmy.com . Prices are similar but both sites are trustworthy and will allow you to return the boards if they are not the problem.
If you haven't replaced a circuit board I have a tip at http://www.fixya.com/support/r6981868-replace_circuit_board_in_modern_tvs which explains the process and should be helpful to complete the repair.
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Posted by Kim... on
Nov 14, 2015 | Sony Televison & Video
Nov 25, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV
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