Samsung UE58TU7100K - no picture, vertical line

[mrsith]

Hi.

Got UE58TU7100K with no picture - backlight comes on though. Figured out that's a perfect candidate for cut tape method.

This model has just one LVDS tape coming off main board - and two panel boards underneath the LCD screen are connected to each other via small tape. Like curved screens. I've tried to disconnect half of the screen (5he side without LVDS connector on it, obviously), no joy.

Disconnected the tape (main board side). Applied a small piece of tape, covering first ~4-5 pins. Powered the TV on - got picture. In negative, but that's still good for 1st try with tape.

I've noticed a vertical line near one edge of the screen. After playing around with tape a bit, I couldn't get anything better than that 1st try. Noticed that the line is always there. Playing around with COF next to it doesn't produce any change at all. I even tried disconnecting the LVDS tape entirely - powered TV on, backlight kicked in - and the line is still there, even when the screen isn't connected to anything at all.

I am 100% sure that there was no line before taping. How is it even possible? I've been playing with tape countless times now and never experienced something like this.

Many thanks for your time in advance, life savers!

[nomoresonys]

Re: Samsung UE58TU7100K - no picture, vertical line

try this, right where the line is give the bezel a squeeze, see if it effects the line any, do not squeeze the screen just the bezel.

[nomoresonys]

Re: Samsung UE58TU7100K - no picture, vertical line

try cleaning your ribbon cable ends with ipa alcohol, some use a pencil eraser be careful they can be delicate, you can also inspect them to make sure they aren't chewed up or have any damaged pins in the process.

[mrsith]

Re: Samsung UE58TU7100K - no picture, vertical line

The panel was damaged. Wasn't visible from outside. Thanks for your help, topic may be closed.