Chosen Solution
Hello <3 I just changed the keyboard and trackpad, an when I turned on the MAC again, the backlight is not working :( Screen is working, I am able to log in, etc. It is the A1502 2013/2015 I reset the connections almost 4 or 5 times and it’s not working. Checked the PCB for faults and everything looks clean and smooth, no water damage or anything. I was wondering if it could be the screen cable, but when I opened the cover at the screen I found 2 different cables:
Do you know if the backlight power is inside the big cable (2) or is it on that other tiny connector (1) ? I am about to buy another LCD cable, but wanted to ask first. Thank you <3
Number 2 in your picture is the LVDS cable. Damage to that cable can cause the backlight and/or entire display not to work. The other issue could be a blown backlight fuse or something of that nature. I would start with an LVDS cable as they’re relatively inexpensive.
