Dell Monitor - Vertical lines - Stuck pixels?

Hi everyone!

I have a Dell U2717D monitor. Unfortunately, there are a few vertical lines in a spot of the screen. I’ve read a bit on the internet trying to find a solution. I’m used to repair screens that don’t power on (faulty capacitors), but not this type of problem (pixels).

First of all, the problem occurs even without connection to a PC. So, it is not a bad cable such as HDMI or DisplayPort. I can see the lines by powering on ONLY the monitor.

I’ve done the BIST test from Dell. The test puts a colored background such as RED, BLUE and GREEN. I can see that the lines alternate in colors. Sometimes there are more lines, sometimes less depending on background color. I don’t really know what to understand from this.

https://www.dell.com/support/kbdoc/en-ca...

I’ve disassemble the monitor to check for any loose connections inside. Unplugged and plugged back the ribbons, nothing has changed.

Is this case repairable ? What could I do ? Could the ribbons be defective ? Should I try to find replacing ribbons or they can’t be the source of the problem ? If so, where could I buy these (I’m from Canada) ? Is the problem inside the panel ? At this point, I believe that nothing could be done ? :(

This is a great monitor that works really well otherwise. I would really like to repair it.

I’ve already seen the following question: Vertical red line on Dell monitor. Stuck Pixel?

But, my problem isn’t solved.

What could be defective ? A ribbon cable ? The board ? Something inside The Panel LG LM270WQ5 (SS A1)?

Thank you very much for your help,

SaxGuit