LG 50LF6100 Glitchy Picture

[philtvman]

This TV will have a glitchy, flickering, double picture. It does not effect the splash screen at all. The picture will flicker (doesn't appear to be backlights, I checked them all and they are all good) and eventually the entire screen will flash white and then black...the TV will stay on, but there will be no picture.

Unplugging each half of the TCON seems to produce a normal half-picture. Only when they are both plugged in does it have issues.

Any ideas on where I should start?

[nomoresonys]

Re: LG 50LF6100 Glitchy Picture

Can you post a picture of the "double picture" you mentioned?

[philtvman]

Re: LG 50LF6100 Glitchy Picture

Can you post a picture of the "double picture" you mentioned?

Maybe "double picture" isn't the best way to describe it. I attached a closer up picture of what it is doing. The image that passes through the particular section will become 'stretched'. The picture will flicker and eventually the screen will quickly wash white (from one side to another) and then black...backlights all stay on, just no picture.

Again, this only happens with both sides of the TCON plugged in. Unplugging in will result on a perfectly fine half screen.

[nomoresonys]

Re: LG 50LF6100 Glitchy Picture

Try heating the capacitors on mainboard with a hairdryer, see if anything changes.

[nomoresonys]

Re: LG 50LF6100 Glitchy Picture

Can you post some good clear pictures of each board and one of the whole back and how they are connected?

[philtvman]

Re: LG 50LF6100 Glitchy Picture

Can you post some good clear pictures of each board and one of the whole back and how they are connected?

No change with the hair dryer. Attached are pics of the entire back, each board, and of a test image on the TV.

Here is a Gif of what the display does in case that helps any.

[nomoresonys]

Re: LG 50LF6100 Glitchy Picture

Try reseating the two tcon ribbons and lvds cable going from mainboard to tcon, might as well clean them while you're in there, can use ISA alcohol or a pencil eraser, be careful they can be delicate, they are easily removed, looked for the clips that pop upwards with a finger tip, lvds cable usually just squeeze the ends, look closely at how things are connected. Never force anything, usually if you have to force something it isn't being done properly.

[philtvman]

Re: LG 50LF6100 Glitchy Picture

Try reseating the two tcon ribbons and lvds cable going from mainboard to tcon, might as well clean them while you're in there, can use ISA alcohol or a pencil eraser, be careful they can be delicate, they are easily removed, looked for the clips that pop upwards with a finger tip, lvds cable usually just squeeze the ends, look closely at how things are connected. Never force anything, usually if you have to force something it isn't being done properly.

No luck with that, Attached are pictures with each half of the TCON unplugged.

(no idea why the attachment tool flips them, they're oriented correctly)

[budm]

Re: LG 50LF6100 Glitchy Picture

what do you see if you have just OSD user menu up without video source?

https://www.badcaps.net/forum/attach...1&d=1567169442
What does the picture look like without having the user OSD showing?

[philtvman]

Re: LG 50LF6100 Glitchy Picture

what do you see if you have just OSD user menu up without video source?

https://www.badcaps.net/forum/attach...1&d=1567169442
What does the picture look like without having the user OSD showing?

Just went to check. TV turned on fine, menu opened fine, but after about three minutes the picture went black. Backlights stay on, but no picture.

This is a GIF of the TV turning on after it lost picture juts now

[budm]

Re: LG 50LF6100 Glitchy Picture

So right now you cannot even get the video back on any more back to original symptom?

[philtvman]

Re: LG 50LF6100 Glitchy Picture

So right now you cannot even get the video back on any more back to original symptom?

If it sits turned off for a while, it will turn back on fine. After about 30 seconds though, black screen. Seems to have progressed quickly from the problem I had last night