I have sound but no picture on model UN60J6200AFXZA. However, a flashlight pointed toward the screen at an angle reveals an image.
Dear my friend if you are electronics technician try to check led back light driver circuit or the back light led inside tv screen .thanks
SOURCE: Samsung LN46C670 LCD TV not displaying picture
There is a good chance that the actual back lights are not working. This could be due to a number of things. The troubleshooting guide is here: http://www.toms-service-manuals.com/?do=search&mfg=Samsung&modelsrch=LN46C670&typekey=0&Search=Submit+Query
SOURCE: How to fix TV
Check and replace the digital main board. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Hi Rick,
It appears to be a case of backlight failure. since you have replaced all the boards, inverter is ruled out. Some of the LEDs in the backlight array may have gone bad. Fault is repairable, but needs care and experience of opening and repairing the LED panel. Good luck.
SOURCE: Samsung 46 Inches LCD TV Model#LN46C630 Black Screen with Sound
Back - light problem. 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. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
Testimonial: "I have LCD TV not LED and i already replaced inverter board. There was a tiny brown spot close to one of the transformers. So i was sure this part is bad but after ordering new inverter board from ShopJimmy and replacing it didn't help. I don't know if the new part is defective or there is something else at play. Thanks"
Back - light problem. 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://electro-medical.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. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
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