Question about Insignia NS-LCD26-09 26 in. HD-Ready LCD TV
I bought this TV brand new from Best Buy several years ago. It's a 26" Insignia LCD TV. Within the last couple of years, the screen would go black until I hit the back of the TV rather firmly a couple of times. One night, my wife saw this happen when the rest of the room was completely dark, and she said that she could still see the picture, just really faint. This lead me to believe that the backlight was at fault. I've dismantled the TV a few times, trying to find signs of a problem, but what I've thought to be the problem (pinched wires, loose solder joint) hasn't been the issue. Knowing that the backlight is essentially just a fluorescent bulb array, I'm thinking some sort of inverter or "starter" circut to be faulty. Has anyone else had such an issue? If so, is there a relatively easy way to fix this?
Try to follow the inverter to backlight connections---either a loose or damaged plug (look for any plug with tape on it at the plug first) or on the board that powers the lights a bad solder connection or connections where plugs connect.
Posted on Oct 30, 2012
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Posted on Jan 02, 2017
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.
Posted on Aug 21, 2008
You are having problems with component failure. This could be a simple problem of over expanded solder connections that have expanded beyond the contact points on the board. This is reffered to as cold or broken solder joints. The other problem amy be actual component failure, such as bad capacitors or semi-conductor components. The unit need to serviced. You can call the Best Buy customer support telephone line at 1888-237-8289 and give them the model number of your television and the problem you are having. They should be able to give you a evalution and esimate of the repair costs. I hope this information helps you with your problem.
Posted on May 25, 2009
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