I have had to replace the 1000mf 10v capacitors twice now. The TV works great for a month, then blows again. What could be causing the capacitors to continue to go bad
It sounds like you are using the wrong type of capacitor. The replacements need to be low ESR, High temp, high ripple current series. capacitors from places like Radio Shack will not work. Here is a link to an article that talks about capacitor replacement and gives the correct brands and series that are rated correctly. http://www.ccl-la.com/blog/index.php/capacitors/ If you use the wrong type they will overstress due to the operating conditions and blown out just like you keep experiencing.
SOURCE: Insignia NS-32LCD Backlight or Inverter bad???
If you've done the flash light test, it could be the inverter board became defective but it could also be that the power supply does not provide the +24VDC to the back light inverter board.
If you could do the +24VDC test using a voltmeter then we can say for sure that the back light inverter board is defective.
Let me know if you need further assistance.
SOURCE: Remove base of Insignia ns-ltdvd26-09
to remove base from insignia tv
1)remove plastic cover from bottom rear of tv
2)remove 8 philips head screws on rear of tv above base
3)pick up tv and base will come off
once you remove it you realize how easy it is
SOURCE: capacitor size
Sure- that's the maximum rating. In fact, if Polaroid had used 35v rated caps in the first place, we probably wouldn't all be replacing them.
BTW another replacement that worked perfectly here.
SOURCE: Insignia NS-LCD37-09 turns on but no image
If your TV is less then a year old, still under manufacturers warranty. If not under warranty the defective parts could be the power supply or the back light inverter board. Both boards can be replace easily.
The way to know if you have a defective backlight inverter is by shinning a light from a flash light near the screen with the TV on and check in a 45 degrees angle if you have a dark video in the background, if the video is present then you have a backlight board failure. If no video, then is a power supply failure.
I have both boards if you want to buy them.
Let me know if you require further assistance.
SOURCE: Insignia NS-32LCD will not turn on.
Heat the bridge rectifier with a blow dryer and see it turn right on.
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