Question about Samsung Televison & Video
The backlights do work when the main board is disconnected from the power supply board. Is there an LED driver on this TV? I'm thinking that might be the problem, but I can't seem to find a part number anywhere.
You have at least one shorted LED in the panel, reason it works with the main disconnected is your removing shutdown circuitry, don't run it this way for any longer than necessary when looking for the faulty lamps..Also be really gentle with the panel and flat cables going to the TCON board, they can be damaged quite easily and if that happens the set is junk..good luck!!
Posted on Nov 15, 2017
Power supply regulator board fault. Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts. Do asearch by type in the brand name of your device at its search box.
It will be best to replace the power supply regulator board as card basis.
Posted on Jun 23, 2014
SOURCE: lg led tv backlight
Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Posted on Feb 05, 2015
Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.
Posted on May 30, 2015
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