Fix monitor strobing with vertical lines Dell U2518D

Hi all,

I dumpster dived a 1440p Dell U2518D screen the other day and figured I'd take a crack at fixing whatever issues it may have. I powered it up to find that even with no signal input the screen flashes rapidly when turned on and has vertical lines across it. I disassembled the monitor and took pictures of the 3 circuit boards inside it along the way.

The three circuit boards are labeled "power board l6256-1m", "LED Driver BD L6257-1". and "Interface Board L6127-1". if anyone has schematics for any of them it would be much appreciated.

I couldn't find any obvious visual signs of damage (anything burned or brown, bulging capacitors) when inspecting the components on the board, but took many pictures of the boards in case anyone could see something I couldn't.

I made an album on google photos here, as well as a video of the problematic behavior of the monitor. STROBING LIGHT WARNING: if you have any issues with strobing images or flashing, be aware that the problem displayed in the video is quite striking.

I have a multimeter and a soldering iron, and am willing to test voltages and such. Please let me know if you have any suggestions of what the issue might be, or if you need any additional photos of any particular area.

Here are a few of the pictures and videos. There are more in this linked album

STROBING LIGHT WARNING:

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Ответ на этот вопрос У меня та же проблема

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