LG UF6450 half screen is black, half is blue/white

[jskuyper]

I have a LG UF6450 55" TV where the right of of the screen is block, the other is either blue or white. The red light when turned on flashes two times. Can anyone recommend what boards might need to be replace?

[budm]

Re: LG UF6450 half screen is black, half is blue/white

Please provide good clear screenshots so we can see what we are dealing with.

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

Here you go

[Ifixstuff9]

Re: LG UF6450 half screen is black, half is blue/white

Might be a bad mainboard, I'm currenly working on a uf6400 that has almost the exact same symptoms. Can you get the TV to display any video on the 'black' half?

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

I can't get anything to display on the black side

[budm]

Re: LG UF6450 half screen is black, half is blue/white

What happen if you have ribbon cable between LCD panel and T-CON board connected only one at time?
Can we see the pictures of the whole back side of the TV showing all the boards?

[diif]

Re: LG UF6450 half screen is black, half is blue/white

I can't get anything to display on the black side

That coloured line i see is just a reflection ?

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

Here is a photo of the boards

[budm]

Re: LG UF6450 half screen is black, half is blue/white

The T-CON board is in the middle of the picture, you can see two flat ribbon cables to the panel, you need to to try having one of them connected one at a time to see what you see on the screen, you must be real careful when disconnect and reconnect the cables.
Note that the tab bonding boards are on the bottom edge of the LCD panel and they can be damaged if some one spray the glass cleaner directly on the panel and the liquid can seep on to the tab bonding boards and cause damages.

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

When unplugging one of the ribbons to tcon the black screen switches sides. When I unplug the left ribbon, the right side is black. Unplug right side left side goes black. Is it the main board then?

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

Would anyone know of a place where this main board would be in stock? Can't seem to find it anywhere?

[nomoresonys]

Re: LG UF6450 half screen is black, half is blue/white

What are the eleven letters on the top right of the barcode sticker on mainboard?

[budm]

Re: LG UF6450 half screen is black, half is blue/white

I would check Voltages on the T-CON board next.

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

Here is picture off main board. Are these the codes you were looking for?

[nomoresonys]

Re: LG UF6450 half screen is black, half is blue/white

Looks like there's a couple different mainboards, your part number is EBT64048902, your full model number is 55UF6450-UA AUSYLJR, DO NOT get EBT64049103 model number 65UF6450-UA BUSYLJR, I don't think it would be a direct match, like EBT64048902 would be.

[budm]

Re: LG UF6450 half screen is black, half is blue/white

So you are not going to do any Voltages testing on the T-CON board?

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

What would I put my meter to test and what would I be looking for ?

[budm]

Re: LG UF6450 half screen is black, half is blue/white

What would I put my meter to test and what would I be looking for ?

Lets see good clear straight shot pictures of the whole T-CON board.

[dick_barton]

Re: LG UF6450 half screen is black, half is blue/white

First I would test the fuse on the Tcon and see if you have the same voltage on either side of it. The fuse is often marked as "F1"

[jskuyper]

Re: LG UF6450 half screen is black, half is blue/white

Picture of tcon