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Fault at its main digital 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.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.
Sounds like back-light inverter fault. Shorted component/s at it. 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/ 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.
The picture is controled by the zoom on the tv remote and on the reciever remote. if you're looking at Wide screen containt the your screen will be black on the top and bottom, zooming will make it fit but you will loose some left and right info. Only HD containt formated for home tv's will, like Oasis, or National geographics, ect will give you full screen. Wide screen is for Movie theaters not TV. This realy sucks but to get a large Wide Screen Picture, You have to buy a supper large tv otherwise, the Wide screen image is small and wide and preaty much anoying with a short wide picture with black bands on top and below.. Sorry. We all have to live with this stuff.
Yes you have a dry joints on the croma,neck board section.
You need to resolder the cold solder first on the neck board (connected to the tube).
Then if nothing work there try to trace the connection of the wire from the neck to the main board.
Look for the dry joints around.Sometimes it is hard to spot so I've advice you to used a magnifying glass.
Thanks for using fixya.
i have had this problem time and tim again with the cyberhome dvr 1600 dvd recorder its not the fuse thats the problem the converter on the power board is blown i have 7 of these with exactly thesame problem to fix it all you need is a new power board if you unscrew it and take the top off then the power bord is to your right hand side big long board where the mains plug in all you do is once you got a new power board unscrew the old one and screw the new one in and plug the cables back in boo it works and by the way i had 7 of these plugged in when lighteing struck and its the same problem with them all
Okay, we work with what we have available to us but the screw on connectors are...... Try reversing the splitter so the single port faces away from the line that runs into the back of tv2 and connects to the the line from outside. Also check to ensure none of the wire braid has come into contact with the center conductor- copper wire, stinger. I do not know how you prepared the cable so I will say that the white dielictric should be cut squarely and terminate flush with bottom of the connector seat. The diagram is a cut away view and is very crude but I think you can garner the idea. If you need more assistance let me know.