What parts do I need to buy to replace 2015 Retina MBP screen hinges?

Both cables can be replaced, the iDP displays data cable is the easier one. Both are quite hard as you need to take the display assembly apart.

@conspansive - To start off, here’s the replacement guide MacBook Pro 15" Retina Display Mid 2015 Display Assembly Replacement so you can properly take the display off.

After reviewing this you may want to look for a used display assembly while being hard to find and costly these days, it still ends up being the least risky as it’s not easy to take these displays apart 15” MacBook Pro displays

Here’s a deeper look at what it will take to replace the hinges MacBook Pro Retina Display Teardown. If you review Step 4 you can carefully replace the display cable at this point. Maybe replacing the one side will be workable for you, as the camera cable is quite hard without taking the displays LCD panel fully out. Which also exposes the sheets to both damage and dirt which when you put it back together is maddening to clean.

Here’s the needed cable/hinge parts for your system

• Left hinge with iDP cable
• Right hinge with antenna/iSight cables

You will need a good heat gun some shirt cardboard covered with foil to protect the LCD from the direct blast of the heat (I cut it down to the panels size with a few mm more and using heat resistant tape to hold it in place. The trick is heating the edge of the cover glass and the case to soften the adhesive and using suction cups to hold both to peel the edge apart staring from the bottom carefully lifting a bit from side to side use picks or cards to prevent the two sides touching. Take your time as you don’t want to pull to hard as the LCD panel is quite fragile! This is a white knuckle job as you won’t know if you’ve damaged the panel until you’ve powered the system on to see it working.