LG 49UH6030 4k TV with 1" Grey bar in the middle

[jason123]

Hi folks,
I picked up a 49" 4k TV that is in good shape, great pic, but has a grey'ish bar in the center. Only things I've tried:
1. Disconnect one ribbon cable from TCON to Panel. 1/2 screen is white and half black, no bar
2. Disconnect the other ribbon cable (and reconnect the first), black bars on one half of the screen and grey bar is present.
3. Disconnect both ribbon cables, nothing on the screen (no bar)
4. Reconnect ribbon cables, and disconnect LVDS to main board - no bar

I reviewed the Sony TCON troubleshooting manual, and this doesn't fall under any of the cases, so I'm not sure what could be the problem. TCON, or panel. Your help is appreciated.

[Diah]

Re: LG 49UH6030 4k TV with 1" Grey bar in the middle

its to me Tap pond, inspect first the TAP components id there any damage, also on the TAP there are 2 small ribbon connector reset them if it had

[jason123]

Re: LG 49UH6030 4k TV with 1" Grey bar in the middle

So applying pressure on tabs / moving them, doesn't seem to have any effect like others I've seen. Components don't show any damage, visibly. Any chance it's Tcon?

[budm]

Re: LG 49UH6030 4k TV with 1" Grey bar in the middle

What is the history of the TV?
This TV uses LCD panel with the tab bonding board on the bottom edge of the scree, they get damaged if some one spray cleaner on the screen so the liquid gets to the board. Do good visual inspection to see if you can see any corrosion.

[Diah]

Re: LG 49UH6030 4k TV with 1" Grey bar in the middle

not t-con... then inspect the panel from top side or down side u may had small broken on lcd film

[jason123]

Re: LG 49UH6030 4k TV with 1" Grey bar in the middle

Hi budm,
No known history - I bought it for $10. Owner said the bar showed up one day.
TV is ultra clean and no visible damage or corrosion on bottom boards / tabs.