Question about Westinghouse TX-47F430S 47 in. LCD TV
Screen scrambles out into various colors and freezes, all picture is lost and it freezes permenantly. I have to pull power and sometimes let the tv sit for hours before it will function properly. TV wont work properly for more than 20-30 minutes. Any thoughts? Anyone have this problem and fix it? What needs to be replaced?
TV requires main board replacement because problem seems in video processing section.
Main board is available at Shop Jimmy on reasonable price. (click shop jimmy link to see an image of main board)
Posted on Jun 12, 2009
Parts must be tested to find out the problem. Most of the video functions are integrated on the main board: http://www.shopjimmy.com/catalog/product/view/id/137590/s/main-unit-48-70e01-01a-from-westinghouse-tx-47f430s/ The main board is hosting the video chipset, and also manages all inputs. If this part is faulty, then the picture can freeze, paricularly if picture it is scrambled , this can be the problem.This part is the first suspect, since it covers most video functions and manages all inputs, however more parts must be tested. The LCD controller is the board that send the signal to the display, a faulty LCD controller can cause TV freezing. when LCD controller is bad, it can cause picture freezing.When it is the LCD controller you often get color bands , or color screen, or you just lose raster. Here is the part: http://www.shopjimmy.com/catalog/product/view/id/137533/s/lcd-controller-v420h1-c07-from-westinghouse-tx-47f430s/ Before replacing parts also the PSU must be tested, even if PSU faults cause shutdown and TV going into protect mode. Since some of the parts are expensive (main board $110, LCD controller $49), it is worth giving Westinghouse a call to get a quote on repair, or to locate an authorized repairer. To contact US customer service you can call: (800) 701-0680 Regards
Posted on Jun 13, 2009
TV tuner has gone bad and would need to be replaced as the decoder is in the tuner thus both needs a change out. Hopeing this would be under warrenty I do have someone that could provide you a good price for the repair on or off warrenty if you would like.
the url is teexp.com try them.
Posted on Jun 12, 2009
The Westinghouse TX-47F430S has a lot of problems with hardware and firmware.
I repaired one with a lock up problem.
The mainboard has identifiers W421TA FX69 MB and 48.70E01.01A stamped on it. It is used in both the TX-47F430S and the TX-42F430S. It is made in China, so of course it has capacitor problems. All the caps look normal. There is no swelling or leaking.
C51 seems to be a real problem cap. This is a 470uF 16V located near the U37 sockets (in my photo, it is circled in red). Fortunately I have an ESR meter. This cap measured an amazing 15 ohms. This is way too high. There are also five 220uF 16V caps that had ESR in the range of 0.7 to 1.0 ohms (circled in purple). I believe C51 was the problem, but I replaced all these caps since I had it open. It has fixed the problem. No more lock ups.
I have read of others with bad C51. If you are looking for bad caps on this mainboard, I would start with C51. Be aware that it will probably read good on a regular capacitance meter. You will need an ESR meter to prove the cap is bad.
Posted on May 19, 2013
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Posted on Jan 02, 2017
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