Do you have a volt meter and some electronics knowledge?...your going to need to take a couple voltage measurements to know what the issue is, unless you're able to do that take it in for service as you could spend a lot of money and still not have a working TV...LED lamps would be a likely cause but most the time they don't start out ok then go dim, they don't work at all or there is a very dim picture all the time.
SOURCE: No video, no audio, red light on in front of TV
Excellent visual acuity technique!! I try to teach that procedure. IC F6629B is probably shorted and at least one other part will be open, possibly a zener diode,a fuse,a resistor or combo. The service diagram would help.Be sure to use OEM first quality parts.Let me know if you need more help.
SOURCE: sound but no video HPT5054 Samsung
One of your transformers on the inverter board are failing to sustain regulated power to the florescent lamps resulting in a dark picture. Also check the SMD fuses on the inverter board(s) see if they have blown. You will need a continuity meter to check them. You can get one from radio shack and be sure to get one with audible sound....you don't have to replace boards when you can fix them.
SOURCE: On Samsung main board model bn94-01708u with no video.
Hi,
I think you need to replace the video card.
Thanks!
mannu_rakesh
SOURCE: I have a Samsung LNT4665FX with screen problems. I
To solve this type of problem, you need a piece of white chalk. Draw a line around the area where the set is at. Call a priest - and lay the poor thing to rest!!!! This isn't the first time Samsung has "dropped" junk onto its' customers. Their dvd players also had problems with their DSP I.C.s that would over heat and cause the video playbacks to "break up". Don't waste any more time or money on the product!!!!!
SOURCE: I have a samsung 60 inch led tv has great audio but to video screen is just dark.
This could be the inverter, the back light or the main board.
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