Lg 60uf770v 4k screen problem

[london-freddie]

Re: Lg 60uf770v 4k screen problem

watching this thread this tv seems to have exactly the same problem as my tv, only difference that i can see is that this tv seems to have two lvds cables from the mainboard to the tcon board, my tv only has the one flex from main to tcon

[budwich]

Re: Lg 60uf770v 4k screen problem

OP... have you tried reloading the firmware?

[daz2206]

Re: Lg 60uf770v 4k screen problem

on mine if i disconnect either ribbon between tcon and panel i get the pink stripes screen on the side i disconnect, removing either cable from mainboard to tcon puts tv into test mode (red/blue/green/black/white) without any flickering or colour problems, im still waiting on my mainboard to be delivered from spain (expecting delivery in next few days)

[daz2206]

Re: Lg 60uf770v 4k screen problem

OP... have you tried reloading the firmware?

no i havn't tried anything like that yet, i just assumed it would have been the tcon so bought that, then when i tried some heat on the mainboard it did make a difference (but i burned a tcon cable while trying to see the screen while astill heating it so replaced all cables) i found something similar on youtube in which a new mainboard fixed it so im hoping for the same

[budwich]

Re: Lg 60uf770v 4k screen problem

on mine if i disconnect either ribbon between tcon and panel i get the pink stripes screen on the side i disconnect, removing either cable from mainboard to tcon puts tv into test mode (red/blue/green/black/white) without any flickering or colour problems, im still waiting on my mainboard to be delivered from spain (expecting delivery in next few days)

good ... thanks for the clarification on exactly "what is which, when and where". :-)

I hope your mainboard fixes the issue. Another question, what signal types are your feeding your set with to get those results (ie half screen). what inputs have you tried?

lastly... history of the set... how did it get to this state?

[daz2206]

Re: Lg 60uf770v 4k screen problem

good ... thanks for the clarification on exactly "what is which, when and where". :-)

I hope your mainboard fixes the issue. Another question, what signal types are your feeding your set with to get those results (ie half screen). what inputs have you tried?

lastly... history of the set... how did it get to this state?

ive only tried the aeriel (freeview) il try hdmi when i get home from work though,
i dont know the history of the tv as it came in a job lot.

[budwich]

Re: Lg 60uf770v 4k screen problem

ok. I would try a couple of different input types / signal types to see if you get a different result... of course if you have the time and while you are waiting for your card.
Further, have you tried any type of reset either at the menu or service level?

[freakaftr8]

Re: Lg 60uf770v 4k screen problem

Well I would not think it is a voltage drive problem to the panel as each side of the panel shares the same tcon voltage outputs. It's obviously a drive signal problem to that side of the panel and whatever was showing on the screen the most predominant color is what the panel get stuck on the 1st time you turn it on. Normally in this situation I take a piece of tape and start covering up a section at a time at least 1 or 2 pins wide across the ribbon cable to the panel on the bad side to see if I can get the problem to disappear. I have done this with numerous TV's of course telling the customer that their panel probably has not long left for this world but it's just a temporary "fix".

As a reminder always do this with the TV powered off and then turn it on to see if the problem disappears. Sometimes disconnecting a ribbon from the panel while the TV is on can damage the panel

[budwich]

Re: Lg 60uf770v 4k screen problem

I am not sure if that explains it (voltage issue) as the test screens appear to be fine.
Further, the response to the "tcon disconnect" results in the same display from either side... which unto itself is strange since the "fully connected" display shows issue always on the one side. OP, when you disconnect the right side (assuming the left side is the "grey out" side), how does the left side display with the right side "pink stripped"?

Further, what does the display look like with the menu pulled up? What are the chances that the "menu" is an "overlay" of half the screen ... :-)

[daz2206]

Re: Lg 60uf770v 4k screen problem

Hmmmm. Just tried to change over to hdmi and i cant do anything apart from channel up/down or power on/off. Ive tried a few remotes (all work fine with my other lg 60uf695v) and even the button under the tv. Cant access menu or input or anything.

[freakaftr8]

Re: Lg 60uf770v 4k screen problem

Same issue the other guy has in the other post. Sounds like a new proprietary LG controller for their 4k sets.

[budwich]

Re: Lg 60uf770v 4k screen problem

:-( I would suggest you try repairing the remote maybe after a tv reset (power unplug?).

Starting to look like a main board issue... although maybe a powering issue going to said board.

[freakaftr8]

Re: Lg 60uf770v 4k screen problem

Possible. Maybe firmware. Odd how 2 LGs same issue, and neither can access menu or change inputs...

[daz2206]

Re: Lg 60uf770v 4k screen problem

Same issue the other guy has in the other post. Sounds like a new proprietary LG controller for their 4k sets.

My other lg 4k tv (60uf695v) works fine from a 10 year old lg remote so pretty sure lg havnt changed anything with the remotes

[freakaftr8]

Re: Lg 60uf770v 4k screen problem

That's what I thought I have never encountered any LG 4ks or brand new ones but LG always used the same programming code just like Samsung and Sony. I'm starting to think main board firmware problem, Especially since you mentioned the flickering stops when you heat the board. It's just odd that happens on half the screen

[budwich]

Re: Lg 60uf770v 4k screen problem

what kind of panel buttons does this set have for controlling / starting things?

[daz2206]

Re: Lg 60uf770v 4k screen problem

what kind of panel buttons does this set have for controlling / starting things?

Just one of them single joystick type buttons underneath like samsung also use these days

[Davi.p]

Re: Lg 60uf770v 4k screen problem

Can you write down the panel model? There's a sticker inside on the chassis..

[daz2206]

Re: Lg 60uf770v 4k screen problem

Can you write down the panel model? There's a sticker inside on the chassis..

here you go

[budwich]

Re: Lg 60uf770v 4k screen problem

IF its one of the samsung type buttons, then it should allow you to get into some control menu by holding the button down and release when powered on and then using the "joystick" function to move thru menus.