Re: Samsung ue55nu7096u - no backlight - faulty LEDs?
If you want to repair TVs, you need to buy a LED tester. 80% of all problems I encounter with LED TVs are bad backlights and the first suspect if the TV turns on with single or repeating flash of backlights, no backlights, dim backlights, dark spots or areas. With a LED tester, you can power the strips through the connector to easily determine if a string has an open circuit. With shorts, you have to guesstimate the voltage based on the number of LEDs but can compare the voltage with the other string. With models with known backlight issues, I typically don't test and just order new strips. However with a LED tester, you can light up one string, turn on the TV and check the panel for damage.
The only way to confirm the part number of new strips is to take the TV apart but having the TV disassembled waiting for new strips makes it more susceptible to being damaged and you may also forget how it goes together. In order to determine the correct strips beforehand requires some googling and research online. I check both Shopjimmy and ebay for part numbers but usually purchase from Aliexpress. The panel number sticker at the back of the panel is one way to confirm your strips are correct if you can find a reference. Two models I had issues with is LG 50LN5310 with two panel types and two different styles of strips and LG 49UJ6500. Shopjimmy indicated only a single panel type with 3 rows of strips and mine had two rows of strips and different panel.
For the NU series, it appears there is only one panel type (typical for edge lits) and two strips at the bottom. You can see if all the listings have the same number of LEDS and same length to determine if there is only one type of strip.
If you want to repair TVs, you need to buy a LED tester. 80% of all problems I encounter with LED TVs are bad backlights and the first suspect if the TV turns on with single or repeating flash of backlights, no backlights, dim backlights, dark spots or areas. With a LED tester, you can power the strips through the connector to easily determine if a string has an open circuit. With shorts, you have to guesstimate the voltage based on the number of LEDs but can compare the voltage with the other string. With models with known backlight issues, I typically don't test and just order new strips. However with a LED tester, you can light up one string, turn on the TV and check the panel for damage.
The only way to confirm the part number of new strips is to take the TV apart but having the TV disassembled waiting for new strips makes it more susceptible to being damaged and you may also forget how it goes together. In order to determine the correct strips beforehand requires some googling and research online. I check both Shopjimmy and ebay for part numbers but usually purchase from Aliexpress. The panel number sticker at the back of the panel is one way to confirm your strips are correct if you can find a reference. Two models I had issues with is LG 50LN5310 with two panel types and two different styles of strips and LG 49UJ6500. Shopjimmy indicated only a single panel type with 3 rows of strips and mine had two rows of strips and different panel.
For the NU series, it appears there is only one panel type (typical for edge lits) and two strips at the bottom. You can see if all the listings have the same number of LEDS and same length to determine if there is only one type of strip.
Comment