Asus XG32V monitor with lines

[BMCappelletti]

Hello.
I have here a Asus 32' curved display showing these lines.



A short clip of what shows when I turn it on.

https://imgur.com/a/Z8fyqym

Here are some pictures of the boards. Visualy they seem fine.










There are lots of videos on Youtube on possible solutions, but I could not find a similar problem with a similar board layout.
Any help is appreciated.
Thanx.

[Dracken]

Hey BMCappelletti,

I'm currently facing the exact same problem as you with an Asus ROG strix XG32VQ.
Did you find a solution?

Did you replace the main board or something else?

Cheers!

[BMCappelletti]

Hey BMCappelletti,

I'm currently facing the exact same problem as you with an Asus ROG strix XG32VQ.
Did you find a solution?

Did you replace the main board or something else?

Cheers!

No luck.
Listed it as "for parts" and someone bought it. Have no idead what was the issue.

[Dracken]

Ok, thanks for taking the time to reply!

[Madero]

Hello,
I am currently trying to solve a similar problem on a vg32vq which has the same board. You could try disconnecting the daughter board of the panel from the main left one and see if you have picture on half the screen without the lines. In that case the problem is on the daughter board to the right. If you could send me a picture of the Ic Buck converter Chip on the daughter board with the resistors below it, it would help me a lot.

If someone has schematics for the board that wokld be great as well

[BMCappelletti]

Hello,
I am currently trying to solve a similar problem on a vg32vq which has the same board. You could try disconnecting the daughter board of the panel from the main left one and see if you have picture on half the screen without the lines. In that case the problem is on the daughter board to the right. If you could send me a picture of the Ic Buck converter Chip on the daughter board with the resistors below it, it would help me a lot.

If someone has schematics for the board that wokld be great as well

Hi. It's been more than a year I posted this.
I don't have any of it anymore.

[Balzat]

Hi
I have exactly the same problem with the Samsung C32JG52QQU monitor
It has exactly the same LCD panel CY-PN315CGAV1F
When I disconnect the daughterboard of the panel, half of the screen is displayed correctly
I am sending a photo of the chip on the daughter board with the resistors below it
I replaced the G1564 chip with a new one but nothing changed
looking through a thermal imaging camera, there is no sign of anything heating up suspiciously
Maybe together we can come up with something

[Johny Hsu]

Hello,
I am currently trying to solve a similar problem on a vg32vq which has the same board. You could try disconnecting the daughter board of the panel from the main left one and see if you have picture on half the screen without the lines. In that case the problem is on the daughter board to the right. If you could send me a picture of the Ic Buck converter Chip on the daughter board with the resistors below it, it would help me a lot.

If someone has schematics for the board that wokld be great as well

Hi Madero,
Pictures for your reference.
How to check & fix the issue?
I can follow your suggestions to test.
Thanks a lot.

[Madero]

Hi Madero,
Pictures for your reference.
How to check & fix the issue?
I can follow your suggestions to test.
Thanks a lot.

Hey thanks for the Picture. I am currently still trying to figure out the issue as well. Just fixing some stuff for a hobby and haven't worked on the monitor since. Maybe we can help each other? If you still have the picture I would be happy if you could send it to me. I am right now switching the IC and will check if that will solve the issue. In my case only the doughter board of the panel has an issue but I couldn't find any short, the ribbon cable seems to be good as well, taping the pins din't help either (sometimes some clck has an issue). In my case the picture fades black as soon as I plug in the daughter board. VGH, VGL and AVDD are dropping in voltage as soon as the daughter board is plugged. Especially VGH towards 0v.

[Johny Hsu]

Hey thanks for the Picture. I am currently still trying to figure out the issue as well. Just fixing some stuff for a hobby and haven't worked on the monitor since. Maybe we can help each other? If you still have the picture I would be happy if you could send it to me. I am right now switching the IC and will check if that will solve the issue. In my case only the doughter board of the panel has an issue but I couldn't find any short, the ribbon cable seems to be good as well, taping the pins din't help either (sometimes some clck has an issue). In my case the picture fades black as soon as I plug in the daughter board. VGH, VGL and AVDD are dropping in voltage as soon as the daughter board is plugged. Especially VGH towards 0v.

The follow test data for your reference.
I'd buy these two board from LCD broken people.
The board no COF cable, so test these voltage just only no connected LCD panel.
I'd change all ICs (chipset), but the screen still shown green & some white line, like BMCappelletti's first picture.
I think this status not CTRL board & SOURCE board issue, I think it is COF cable fail or panel fail.
But I still waiting for your good news, hope you can find issue & fix it.

[Madero]

The follow test data for your reference.
I'd buy these two board from LCD broken people.
The board no COF cable, so test these voltage just only no connected LCD panel.
I'd change all ICs (chipset), but the screen still shown green & some white line, like BMCappelletti's first picture.
I think this status not CTRL board & SOURCE board issue, I think it is COF cable fail or panel fail.
But I still waiting for your good news, hope you can find issue & fix it.

Do you maybe have the resistances of the rails to gnd? I would be interested what resistances you have especially on 12v, VGL, VGH and Avdd, Havdd. Do you have a different resistance on 12v when the mainboard (with the hdmi ports, etc) is plugged to the tcon board as without plugging it in? Does half your screen work when the source board is unplugged from the tcon board? Thank you!

What is your resistance on the coil L306 next to VGL1?