Chosen Solution
Hi, I forgot to press the battery disconnect button prior to swapping the trackpad cable in a 2016 A1534. I noticed a little spark/sizzle/smoke come from the logic board sizzle as I was closing up the Macbook. Needless to say the keyboard and trackpad are no longer working. I took a close look at the logic board under a microscope and I found nothing but a nice big solder ball sitting between the pads of L4803 . I’m not too familiar with board level repair but I’ve been reading a bit about it in light of this disaster and I figure since I have access to all of the tools required to attempt repairing it that I could give it a shot. I don’t see any traces leading to L4803, does anyone know where I would solder a jumper wire? thanks
pics after removing solder blobs
@berniemacbook
connect one jumper from pin 1 of L4803 to pin 1 of C7670
Connect another jumper from pin 2 of L4803 to pin 14 of the trackpad connector
Update (12/13/2018) You could do that with L4804. If you need to run jumpers connect pin 1 of L4804 to pin 1 of L4010
connect pin 2 to pin 24 of the connector
The best I could manage were screen shots from a board view file. You might need to jumper over to the nearest remote points. Edit: Adjusting for correct board file It might be easier to give you the resources, in case you need to trace more. I found the board view and schematic here: https://www.ghostlyhaks.com/forum/macboo… Software for the board view here: https://openboardview.org/ Open the software, open the brd file in it, then Control + F and input L4803, press enter and it will highlight the component. The circles represent the pins, when clicked it shows lines to connection points.
