I have a Toshiba TV model #43L511U18 that has sound, but backlight is out. With the "flashlight test" you can see a picture though. Any ideas on repair?

SOURCE: 47inch toshiba lcd tv (HL167) black picture, but

Best to replace both at the same time . Yes they are easy if you can find the parts.

The Knight

• 76851 Answers
• Posted on Dec 02, 2014

SOURCE: How do you change a backlight inverter board on a Toshiba 46L5200U TV?

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

The Knight

• 76851 Answers
• Posted on May 30, 2015

SOURCE: 47' (sic) LED TV, model number m470vse. Why doesn't the backlight work?

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.
http://electronicshelponline.blogspot.com/
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.

Gregg

• 362 Answers
• Posted on Oct 15, 2015

SOURCE: Model 42LN5700. What caused backlight failure?

Backlights do fail, and can be replaced. If the set is more than 5 years old, it could simply be backlight failure.

The Knight

• 76851 Answers
• Posted on Nov 21, 2015

SOURCE: Ok I tried the flashlight test on my tv and I can see picture and ther is sound and I don't know where is the backlight inventor in my tv how I would know what's wrong if it's back light or led prople

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.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.