LG OLED Problem 55EG960V

[jasonr2000]

hi guys I have an LG OLED TV 55EG960V

that started to display garbled images while menu icons was ok.

and now it no longer turns on.

could this be a bad main board ?

ive tried to source one but so far im having no luck.

so basically I have a 55" doorstop at the moment.

can anyone advise what I can look for / check ?


thanks

Jason

[TeslaMichael]

Re: LG OLED Problem 55EG960V

If it would be the T-Con, then everything would look broken. because it goes from Mainboard to T-CON and the t-con cables are going into Panel. if i'm not wrong, the t-con does display the volume, and other things.
i'm thinking too, that this could be a mainboard issue.

[Davi.p]

Re: LG OLED Problem 55EG960V

Make a CPU reballing..

[jasonr2000]

Re: LG OLED Problem 55EG960V

hi guys thanks for the replies.

ive had no luck so far sourcing a mainboard for this tv.

and to be honest I wouldn't know where to begin reballing the CPU on there or finding out which one is the CPU lol,

one more thing is there anyway to display the colours bars on these tv's ?

thanks

Jason

[Davi.p]

Re: LG OLED Problem 55EG960V

For the reballing you can research locally or the nation for reballing service centers
for the autotest, i know in lcd displays there's a method to show it by simply suplying power to it but not any video or other signals. Try the same with this..

PS: my previous post advice is not a solution but a diagnosis due to high percent of those problems in lg tv..

[jasonr2000]

Re: LG OLED Problem 55EG960V

hi Davi.p

thanks again for the reply.

I have tried to power it on without the mainboard LVDS cables connected

but nothing happens.

is it looking for a power on signal or something ?

thanks

p.s as the mainboard just causes the power logo to blink while connected I don't think its actually turning on the PSU and doing anything ???

[Davi.p]

Re: LG OLED Problem 55EG960V

Just to clarify, i mean supplying power to tcon, so i guess 12v+24v, and nothing other
to take those tensions by the internal PSU you must turn on a pair of control signals.
So post a photo of serigraph tables around connectors on PSU..

[jasonr2000]

Re: LG OLED Problem 55EG960V

Sure here is the pin out to the main board connector

Thanks

[Davi.p]

Re: LG OLED Problem 55EG960V

Just put a jumper 3,5v-PWR-ON-DRV-ON-12VT-ON
post PSU model number

[jasonr2000]

Re: LG OLED Problem 55EG960V

Sure here is the model number / part number

EAY62992602

[Davi.p]

Re: LG OLED Problem 55EG960V

So by the photos i don't manage how to.connect all the power supplies without connecting data

[lotas]

Re: LG OLED Problem 55EG960V

Eay62992602 psu

[jasonr2000]

Re: LG OLED Problem 55EG960V

Eay62992602 psu

thanks for the attached PDF

that will help troubleshoot the PSU

now to find one for the main board would be good

EBT64032668 / EAX66685201


thanks again

[jasonr2000]

Re: LG OLED Problem 55EG960V

Just put a jumper 3,5v-PWR-ON-DRV-ON-12VT-ON
post PSU model number

Hi again

The display glows so I assume that's ok ?

It don't display colour bars or anything but there could be it needs a signal or something from the main board and as that's not powering up

It's not likely to so would that rule out the display as being the issue ?

Thanks

[Davi.p]

Re: LG OLED Problem 55EG960V

Starting from my point of view of bad CPU the display must be ok, but the test you have done it is not a self test so no sure answer

[jasonr2000]

Re: LG OLED Problem 55EG960V

Well I know there was no physical damage to the display it just started off with a garbled image on HDMi and the apps and then not powering up.

So I would say the main is the problem.

But I can’t source one to test.

I’m still trying to find someone to reball the cpu

But I have found some dead shorts coming from the cpu on several caps

[Davi.p]

Re: LG OLED Problem 55EG960V

How do you know if them comes from CPU without a schematic? If you think that you can post photos of what you are measuring but I'm convinced you are wrong due to the progressive damagement

[jasonr2000]

Re: LG OLED Problem 55EG960V

The sectioned circled is where I find the dead short to ground

[Davi.p]

Re: LG OLED Problem 55EG960V

Check if the top 3 terminals of those components and bottom 3 are connected together..

[jasonr2000]

Re: LG OLED Problem 55EG960V

The bottom ones are all connected to ground but the top ones on the first two are not.

But the 3rd one is grounded

Both sides