I think the vertical lines come from defective COF (chip on flex) connection. This chip drives the current for the pixel on the panel and interface with the driver chip (LVDS chip). On this screen there is 4 horizontal COF, and 5 vertical COF.
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Repairing this will need in my opinion high skills, good tools like hot bar soldering station (the chip is not soldered but glued thanks to an anisotropic tape) and good knowledge. I don't think this can be done by a DIY. By the way, the replacement of the whole screen seems to be the best solution right now.
I've managed to use another LCD to replace my defect screen but I had to do electronic and mechanical adaptation to succeed.
Hi,
I think the vertical lines come from defective COF (chip on flex) connection. This chip drives the current for the pixel on the panel and interface with the driver chip (LVDS chip). On this screen there is 4 horizontal COF, and 5 vertical COF.
I've managed to use another LCD to replace my defect screen but I had to do electronic and mechanical adaptation to succeed.
here is the link:
http://www.ifixit.com/Answers/View/28610/Do+any+other+LCD+panels+work+with+this+iMac
Best Regards,
Guile