While watching tv, I was programming the remote when suddenly the screen made a noise, went green for a couple seconds, and then turned dark. This had happened in the past. The screen would suddenly go dark, but then a quick unplug and replug and it would come back on. This time, no luck. When I turn the power on using either the remote or the front panel button. The screen flickers briefly and then goes dark.. but not completely dark....only dark on the left half of the screen while the right half has a glow still. 1) I took the back off and inspected the power supply. There are no obvious signs of blown anything. All caps appear good, etc. 2) I took the covers off an inspected the main logic board. Same thing..no obvious signs of anything blown. 3) I noticed that the back light is only on on the right side of the screen. I traced back to where they get their power and out of curiosity switched the two sides. I put the right side plug into the left power source, and vice versa. Still the same. The right side came on, but not the left. a) This leads me to believe the power source is ok correct? Since the backlight came on for the right side in either case? 4) Also, once the tv is "powered" on, with half the screen backlit, none of the panel buttons will work. I see nothing when I hit menu, etc. Pushing the Power button again does nothing...no power off, etc SO...questions.. A) Does this mean the inverter board is out? it appears that the two inverter boards are connected with a ribbon cable from something? But if the inverter board was just out on one side, wouldnt you still see some kind of picture on the left side? shouldnt I be able to see some reaction from the panel buttons? Would bad caps or something in the power supply have caused this? B) or..could this whole thing be the main logic board? Im really confused by the lack of evidence, half backlit, power works for the right side in both plugs, panel buttons dont work etc... Thanks in advance for any help...
If you had audio i wold say its most likely the Tconn or its upper two connections to the Panel itself. But since you dont have any sound either I would assume its either the LVDS cable from the main board to the Tconn or the Main board itself as audio and video are produced on the main board, You can get replacement boards from www.tvrepairworld.com
SOURCE: Olevia 42" LT42HVi has sound but picture had gone blank.
You do have sound, but no picture.
I believe the power supply and main board is ok, because you can hear the audio.
Most of the majority of these problems that have no picture is the back light inverter. That's what supplies power to the screen. I would look into that as the source of the problem.
SOURCE: Olevia lt42HVi Blue led goes out when power on,
The screen fuse probley blew so you should unplig it cause there's a possibility that it could catch on fire
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yes the main board connects to the Tcon via the LVDS cable
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