Re: LG42LK430 Discoloured Vertical Bar

Thanks, tom66

Pity. I shall shall part it out.

Thanks all for the help!

Re: LG42LK430 Discoloured Vertical Bar

It turns out that the is the ribbon cable connection on the driver board is faulty. Applying pressure can resolve the issue, but it is temporary. I am experimenting with some shims to push it down when the bezel is screwed back into position. Thus far I could not find a reliable solution.

Do I understand correctly that these ribbon cables are glued onto the PCB, or do they use some solder that can be redone?

Thanks in advance

Re: LG42LK430 Discoloured Vertical Bar

Thanks, neilc6

I'll give it a shot.

Hi

This is my first time working on something like this, so I hope that my terminology etc. is correct.

I saved the LG TV from the junk pile. It displays a magenta bar down about a quarter of the screen. The PSU and mainboard seems to be in perfect order as sound, video and back light works.

I found some infidelity on the ribbon cable connecting the mainboard to the T-Con (if I push it the wrong way, the picture will disappear).

The bar will display whether the T-Con is connected to the mainboard or not. The cables between the T-Con and...

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Hi

You can try to run without any BALUNs for a test. There will be some impedance mismatches, but if the cross talk stops, then the 4CH BALUN is most likely the culprit.

Ideally the setup should look like the attached document.

Some BALUN manufacturers have special models for AHD, TVI and CVI cameras. I never opened them up to compare to those for SD CCTV models. Maybe someone else can comment whether it is just a trick to charge more for the same thing or if there is...

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Hi

I am probably resurrecting a long dead thread. Do you still have this setup and problem?

I do not have working experience with TVI, but have worked with analogue.

Do I understand correctly that you have only one 4 channel BALUN? No other? You should have BALUNs on the camera and DVR side for correct working.

I have come across some very bad 4 channel BALUNS that allowed for cross talk between channels.

I would get 4 single channel passive...