Hi, I have 2017 Toshiba 43L511U18 model, recently got black screen during watching but sound still working. I didn't see the LED backlights or images in screen when put in darkroom and shining by flashlight. T-con board already replaced but still in same issue. Is the LED driver build in power supply board? Do you think is the issue cause by bad power supply board? Thanks!
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.
You only have 3 modules in the back of that unit, the wifi and the sound master board and the video board. Samsung knows they have a issue with some, there is a diagnostic mode that will help you to determine, I would contact tech support before I bought a 350.00 module just to confirm, however I think your on the right track
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.
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.
SOURCE: RCA LED HDTV SCREEN went black while watching tv. Still has sound.
please see your other post for response
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