The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; [Exclude the model number], in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
SOURCE: rolling picture
If your Television is not warrantied, there should be rca, vga, and dvi connections you can use with your pc and video card. Since I am in usa I have know idea what freeview, skybox, or scart are.
SOURCE: AV1 / AV2 Connections don't work
No picture or dark picture
Check R516 (56Kohms, 0.5w) or R517 (27Kohms, 0.25w) for high
Will not come out of standby, no picture
If at power on voltage on pin 37 of the micro drops low then reverts to 5v suspect memory chip ICA07 (Toshiba 23319016)
No picture No sound
Faulty IC TDA6107q on crt board
No picture on e-e, I.F output ok
This was due to switching chip IC3901 (M51292FP) on the scart panel
SOURCE: LG LCD/DVD TV no sound on TV - DVD works fine with sound!!!!
HERE is the servce manual for this TV
SOURCE: no sound through ps3 hdmi
hi i had a problem, but had no pic, but did have sound, rang sony, and they said buy a new hd cable, went out and bought one, and it worked fine!!!
SOURCE: When trying to switch from AV1 to AV2 with the
The Red, White & Yellow connectors are your composite inputs usually classed as AV3 or component. The AV1 input is a Scart connection, if you have a scart cable, connect this as your AV source & the TV will switch from AV to component.
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