Sony XBR-55A8G 4K OLED image ghosting/jumping around

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

about the point which Lotas bring it at post #17, its seriouse , we didnt judge the socket self if it scure connected ot not... but the LVDS cable are flat one and at the end of it the pins by pressure connect to the LVDS end plug, if there no tight mean we do have the issue as i wrote in post #3 & #10

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Hi Diah,

Are you referencing testing these input voltages from PSU rails to TCON? (See image)

yes

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Thank you Diah, I will check those with multimeter and respond to the thread with results.

I have also ordered replacement FLEXIBLE FLAT CABLES 41P/51P for connection from mainboard to TCON but they will not arrive for a couple weeks.

Hi Diah,

Are you referencing testing these input voltages from PSU rails to TCON? (See image)

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

You need to press on these latches, one of you is broken on one side.

Thanks Lotas, I figured that out, the connectors are still secure and function, just the little tab thing broke at the top.

[lotas]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Hello, the side of these is hard molded plastic, there is nothing to press in.

You need to press on these latches, one of you is broken on one side.

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

here OLED Panel not LCD.
as i thought in my post#3 as BGA and he did changed MB... so the issue remain BGA or bad connection at LVDS /T-CON / Ribbon / you need to put yours DMM and measure the 12V rail and 22V rail which coming from PCB to T-CON if they are stable or jumping as the picture change.

Thank you Diah, I will check those with multimeter and respond to the thread with results.

I have also ordered replacement FLEXIBLE FLAT CABLES 41P/51P for connection from mainboard to TCON but they will not arrive for a couple weeks.

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

here OLED Panel not LCD.
as i thought in my post#3 as BGA and he did changed MB... so the issue remain BGA or bad connection at LVDS /T-CON / Ribbon / you need to put yours DMM and measure the 12V rail and 22V rail which coming from PCB to T-CON if they are stable or jumping as the picture change.

[Nick's Tvs]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

You might have a faulty panel, but you might still be able to fix it by blocking the correct clock lines.
Check out this video from frugal TV repair on how to do this.

https://youtu.be/pfrRhw7-ZII

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

might need to update/pair the firmware.

Yes I upgraded firmware to latest from Sony website already as well.

[nomoresonys]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

might need to update/pair the firmware.

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Hello again, I have replaced the motherboard with a new motherboard and the issue still persists exactly the same, any other suggestions of things to try?

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

this is yours problem... bad connection... i wrote at post #3

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

1- Press
2- Pull

Hello, the side of these is hard molded plastic, there is nothing to press in.

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

1- Press
2- Pull

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Taping cables will result in a shut down / error. This t-con is not similar like the ones from lcd/led tv's.
The problem looks like a gate error but i'm not 100% sure because i've never seen this failure in an oled tv.

Thank you for the information William. That helps me from going on a wild goose chase.

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

I uploaded pics of the front of the mainboard, any suggestions on getting these ribbon cables out? These are the only two I could not get, I don't want to break them.

I will upload pics of the back once I get these out, thank you for the help so far.

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Repair the MB by reflew it by heating. show us the photo please over here use GO advanced and post the MB photos clear and focused from the TOP and down side.

[Cheesesteak]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

it sound you have BGA issue at MB. FRC IC react of losing signal from main IC.
FRC IC = the one close to LVDS.

Do you think replacing the mainboard would fix this issue? Or mainboard and cables?

[Diah]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

it sound you have BGA issue at MB. FRC IC react of losing signal from main IC.
FRC IC = the one close to LVDS.

[William1967]

Re: Sony XBR-55A8G 4K OLED image ghosting/jumping around

Taping cables will result in a shut down / error. This t-con is not similar like the ones from lcd/led tv's.
The problem looks like a gate error but i'm not 100% sure because i've never seen this failure in an oled tv.