Question about Westinghouse W4207 42 in. HD-Ready LCD TV
I'm willing to bet it's the main board. Its the board that all the video and audio inputs. What is the model number I could find the part for you. You could change it out yourself, Its not that hard. Let me know.
Posted on Dec 16, 2009
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Posted on Jan 02, 2017
had the same problem. if you take out the power supply in the back of your tv ( easy to get to just a few screws in back to get to the box then a few more to get into it and some quick disconnects) you can take it to a local tv repair shop and they can remove the two green capacitors in the upper left of the circuite panel and place in 16v ones that can actually handle the power needed. do not try to do it yourself although the new capacitors only cost 2 dollars one wrong move and you burn the wires on the board. the repair man only charged me 54 dollars well worth it considering polaroid wanted to charge me 500 to fix a 2 dollar part that should have been recalled. they are in the busines to make money but if any of us did what they did wede be considerd con artist. final note since ive replaced the capacitors my tvs worked better than when i bought it
Posted on Oct 08, 2008
there is a bad capactor in the power supply this part lloks like a little can and will have a puffed up top from venting value of the part is on the side. You or someone qualified will have to replace it and you should be good to go
Posted on Jan 03, 2010
1 swollen Capacitors / Replace
2 blown Diodes on inverter board / on some # 508 or 908
3 bad transistors in inverter bad will appear overheated powdery coat
4 replace inverter if you cannot locate problem on it
there is a safety built into the high power back light supply and that is if too much current is drawn or light is shorted it will not burn up
or hazard high volt shock to user.
capacitors and diodes driven with power transistors
look for darkened spots on the board to identify hot transistors
puffy tops and leaky bottoms of capacitors
when you turn it on does the bottom or top of the screen show image a Milli second before the other it should be evenly the lag
is the one requiring more amperage
Posted on Aug 07, 2010
SOURCE: My 1 year old Sanyo
Thanks for using FixYa. As the sound is working fine then the issue seems to be with a bad inverter board and/or it is the not getting the required power supply (20vdc) from the power supply board of the unit. To resolve this issue you'll have to open the unit and check the inverter board which is the power supply source for the backlights. If that's the issue then it's always better to replace the inverter board completely just to avoid any future issues. Please accept the solution if the issue is resolved or post a comment for further assistance.
Posted on Oct 11, 2010
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