MacBook Pro M1 A2338 Display problem

Apple, like many manufacturers, has dramatically reduced the number of separate spare parts it keeps available, and made each spare part it does keep MORE complex. That has a tendency to reduce its overall repair parts costs.

However, that means that for almost all MacBook Pro models, the field-replaceable unit is 'Display Assembly, complete' which includes a captive ribbon cable that is not replaceable separately.

Punchline: as HWTech notes, a failed display for ANY reason means display replacement.

Vertical lines usually indicate a hardware issue with the Display Assembly which will need to be repaired.

You can't do that repair with ordinary soldering iron type tools.

For ease in high-volume manufacturing, the MANY contacts on the display-end of the flex cable are attached to the rest of the display module using surface-mount technology. You need an expensive board-heater to heat the entire end of the cable up just to remove it, then you need to do the whole process again to replace the new cable, and hope all the contacts make their connections.

if it were easy, or even predictable, there would be services advertising to fix your cable on the internet every day. They are NOT.

Yes, that is a possibility, but it still requires the replacement of the whole Display Assembly.