Viewsonic VA1616W driver board burned

[r38_]

Hi everyone, i connected my va1616w monitor to netbook and it burned components of the driver board in the vga port area, i think i bad connected the cable by mistake. After this the monitor power on but never receives signal from computer or any connected to vga port.

I didn't find schematics of the driver board. Also i tried a universal lcd controller (mt6820-t) board with the panel but it was not supported. This is repairable or the board is dead? Thanks in advance. Images of the board:

[petehall347]

Re: Viewsonic VA1616W driver board burned

give it a good cleaning

[r38_]

Re: Viewsonic VA1616W driver board burned

give it a good cleaning

I found board schematic, what value would be r12 and r9?

[R_J]

Re: Viewsonic VA1616W driver board burned

The resistors are likely 75Ω, but they won't be the problem, I suspect the ic RTL2525LH that is connected to these lines has been destroyed. Buy a new replacement board from aliExp.

[r38_]

Re: Viewsonic VA1616W driver board burned

The resistors are likely 75Ω, but they won't be the problem, I suspect the ic that is connected to these lines has been destroyed. Buy a new replacement board from aliExp.

I thought about it, but i didn't found any replacement board in aliexpress or other sites

[R_J]

Re: Viewsonic VA1616W driver board burned

Is this not the same board? https://www.aliexpress.com/i/4001097110422.html, You may need to swap the spi ic U6

[r38_]

Re: Viewsonic VA1616W driver board burned

Is this not the same board? https://www.aliexpress.com/i/4001097110422.html, You may need to swap the spi ic U6

Yes, that's the same board. Unfortunately, the board + shipment + import costs, the final price is $60~, which i think is not worth it for a 15' lcd monitor.

Anyway, thanks for the help!

[R_J]

Re: Viewsonic VA1616W driver board burned

It seems odd to me that connecting the vga cable did this, there should only be video signals of around 1v p/p on these lines.

[lotas]

Re: Viewsonic VA1616W driver board burned

Most likely I connected the VGA cable to a hot one (the laptop was connected to the network via an adapter and the monitor was connected to the network).

[R_J]

Re: Viewsonic VA1616W driver board burned

Have you checked the values of R9, R12 and R15? that may not be your problem. Check the voltage on (1_8AVCC1)1.8v and (3_3VCC1) 3.3v