I did some further experiment and that confuses me now completely. With the bridge between left and right panel driver board removed, I cut VSS. I found a video on Youtube, that stated, that VSS actually should be cut not at the ESD protection device, but on the very left side of the panel.
After doing that, the TV started with the bridge on the motherboard. So half of the screen showed a picture, but just strange lines, not a normal picture.
I wanted to try, whether now the other side would at least show something as well and connected the ribbon cable between left and right panel...

I thought since the TV was not in a reboot loop without the bridge, that I would have different problems.
What is the "short killer method" ?

Does noone has a Tip, why the bridging of the motherboard does not work in my case ?

Davi.p[USER="13553"]Davi.p[/USER] but if I draw that signal to GND, that seems to be the same as the current situation, where a signal is shorted to GND inside the panel ? Am I missing something here ?

For the two responses:
- I removed the ESD protection diodes on the right side on both TVs. I still had to cut 4 CK lines (CK1, CK6, CK7 and CK8) in my case. TV would go into reboot loop if any of those was connected. So I do not understand, how I can improve the missing horizontal line now ?
- with just the left connected and the FPC between left and right removed, the TV does not reboot. It will only do that, once I connect the bridge on the motherboard. So will cutting the same lines help me ? You write: "putting pull does resistors on the strip board". I don't understand...

Hi, I have two identical Samsung GU58TU7199, which both had the reboot loop. On that model TCON is integrated into the motherboard and there is only one FPC cable, which goes to a driver board driving half of the panel (left side seen from the rear of the TV) and than another FPC cable connecting left side to the right side.

The first one was easy, once I disconnected the FPC between left and right the TV did start up. I soldered a bridge on the motherboard on the test points as found here in the forum or on Youtube and half of the screen was coming up. I than tried the CK1..8 lines...

I did look on AliExpress. If I search for the panel name, only TCON boards show up. If I refine my search for e.g. 4 ch LVDS 10 bit, some boards come up, but no info, on whether timing could be adjusted, ... My experience with AliExpress is, that you usually get a board with no additional collateral, so no info how to adjust it. I also sent mails to some of those vendors, however no response from any of them. As I am not so experienced with LCD control I thought someone here might have additional tips.

Does nobody have any tips ?

Thanks for the answer, but this is another complete TV. I was hoping for a [B]HDMI LCD Controller Board [/B]similar to that one: [url]https://www.amazon.de/Controller-Board-Treiber-1920x1080-Bildschirm/dp/B06WVMPWHP?th=1[/url]
Again, I would like to misuse the panel as a picture frame.
​Thanks for the answer, but this is another complete TV. I was hoping for a [B]HDMI LCD Controller Board [/B]similar to that one: [url]https://www.amazon.de/Controller-Board-Treiber-1920x1080-Bildschirm/dp/B06WVMPWHP?th=1[/url]
Again, I would like to misuse the panel as a picture frame.

Hi, I have a 42 inch LCD from LG, part number LC420WUD-SBM4. This is from a broken TV (German brand Loewe, model Art 42 SL). I would like to misuse this LCD as a picture frame. That panel is a bit special, since it has 4 x LVDS channels with 10 bits each, but only WUXGA (1920 x 1080) resolution. I have been trying to find a controller board with HDMI interface for this panel, but was not successful. Any tips, where I could find one ?

Hi, I do electronics repair as a hobby, I am an EE and work in semiconductors, but repair has nothing to do with my professional life. I do have quite some experience in many fields and have a decent electronics lab including SMD rework equipment, digital storage scope, microscope, ...
Thanks for hosting this forum