Tip & How-To about Televison & Video
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
4,096 people viewed this tip
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