Question about Sony Bravia KDL-37M4000 37 in. LCD HDTV
Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Posted on Dec 08, 2014
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Posted on Jan 02, 2017
Check the connections between the cable box and the TV. If you are using scart check the connector is in squarely if using rgb or composite you need a separate audio connection using the red and white phon sockets.
Posted on Nov 08, 2009
SOURCE: No picture or sound. Red light
Just a correction, it is not necessary that 4 times red light blinking always shows inverter board problem.
It depends on chassis/ model number of Sony bravia tv to what is error code of 4 blinks as it would be mentioned service manual.
I'm Sony tech and can help you, let me know model number written at back of tv to provide you exact info about 4 times red light blinking.
Posted on Aug 18, 2010
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