2 Nothing shows on screen when keyboard/trackpad is plugged in.
I replaced the LCD on a 2015 Retina MacBook and now the laptop isn't showing anything on the screen except a battery indicator when plugging in the laptop. However after unplugging the keyboard/trackpad from the mainboard the image comes up right away and the laptop boots. I was able to plug in the keyboard/trackpad after the laptop booted and then the trackpad would work but the keyboard still wouldn't. It's also worth mentioning that the power button still works fine when the rest of the keyboard doesn't. My thought at this point is that the laptop is rejecting the new LCD but I have no way of testing that. Has anyone seen this issue before or have any thoughts? Thanks!
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Why did you have to replace the screen to begin with, and what is the history of this device?
por Rany
It was a cracked screen. I don't know the whole history of the device as it is a customers, but I believed it may have been dropped.
por Jonathan
May be it was like that before? Was anything visible using the old screen?
por Rany
Possibly, nothing was visible before if I remember correctly, the weird thing is that the image comes up fine and the laptop boots completely normally right after I unplug the keyboard
por Jonathan
I don't recall such an instance where keyboard prevents laptop from displaying an image. I know it can prevent it from booting.
So if your computer is not booting, you need to consider the keyboard or trackpad or cables between them and the board. If your computer is booting but not showing an image, I wouldn't know why but would still try to isolate one of the above.
por Rany