Chosen Solution
Hello, I have A1398 15" Retina display mid 2014 MacBook Pro. I was cleaning display and during doing it I put the brightness at min level. After that when I turned on brightness, I got half of the LED backlight LEDs not working, and flickering, then after 5-10 minutes, backlight is gone, the Apple logo at the rear not shining either. If I shine flashlight at the logo, I can see login screen at the screen. The MacBook works fine with an external display. I did all resets, nothing helped. So, as i investigated the net and this site, it could be backlight fuse. So I did disassemble plugged unplugged wires, looked for visible damage of components tried to locate backlight fuse, but unfortunately I have a newer version of logical board https://47dqy71du7e1rvs1n3ezfll1-wpengin… I guessed that the fuse is yellow one with “P” sign on it or a big green near it. Does any one know where fuse and driver located on this logic-board? P.S. When I got that issue, I got the feeling that my (not hard) pushing the screen with napkin during cleaning caused this problem, could it be?
@dennisfyodorov check the image for the location of the parts. Unlikely that these failed by you pushing on the screen. Anyhow see if that helps.
The fuse is a 3amp 32V fuse in a 0603 package. The backlight driver U7701 is a LP8548B1SQ_-03 IC
