Macbook Air A1466 no power, won't start

[techneer]

Recently a customer brought in a Macbook Air A1466 with motherboard 820-00165-A. It wouldn't power on, despite voltage present beyond the power jack board and points around the battery. [Before I go any farther don't be jacking around inside your Macbook or any computer if you don't know what you're doing, okay? Same thing with cars, etc.]
I tried disconnecting the keyboard and starting using the power pads located just above the wireless card as shown below. What you do is short them with a small flat-blade screwdriver or similar instrument. In my case it wouldn't power on. [Here's another site that shows power pads for other MacBooks: http://www.insidemylaptop.com/turn-...-without-power-button-locating-power-on-pads/]

After locating the schematic and boardview for the board (https://github.com/pctechneer/Diagnostic/blob/master/820-000165.zip [This is the schematic and boardview.]). I used the Open Board View application (https://www.softpedia.com/get/Multimedia/Graphic/Graphic-Others/Open-Board-Viewer.shtml or https://openboardview.org/) to view the board (.brd document) to identify where the fuses were, since I suspected a blown fuse. After testing for continuity (using multimeter) I located the bad fuse in the schematic (PDF document) to get the kind of fuse. In my case it was the F7140 fuse which according to the schematic is an 8Amp, 24V type (or format) 1206 fuse. I ordered that from Digi-Key, and am currently awaiting it arrival. Update to come.

 

[techneer]

Recently a customer brought in a Macbook Air A1466 with motherboard 820-00165-A. It wouldn't power on, despite voltage present beyond the power jack board and points around the battery. [Before I go any farther don't be jacking around inside your Macbook or any computer if you don't know what you're doing, okay? Same thing with cars, etc.]
I tried disconnecting the keyboard and starting using the power pads located just above the wireless card as shown below. What you do is short them with a small flat-blade screwdriver or similar instrument. In my case it wouldn't power on. [Here's another site that shows power pads for other MacBooks: http://www.insidemylaptop.com/turn-...-without-power-button-locating-power-on-pads/]

After locating the schematic and boardview for the board (https://github.com/pctechneer/Diagnostic/blob/master/820-000165.zip [This is the schematic and boardview.]). I used the Open Board View application (https://www.softpedia.com/get/Multimedia/Graphic/Graphic-Others/Open-Board-Viewer.shtml or https://openboardview.org/) to view the board (.brd document) to identify where the fuses were, since I suspected a blown fuse. After testing for continuity (using multimeter) I located the bad fuse in the schematic (PDF document) to get the kind of fuse. In my case it was the F7140 fuse which according to the schematic is an 8Amp, 24V type (or format) 1206 fuse. I ordered that from Digi-Key, and am currently awaiting it arrival. Update to come.

Okay, got the fuse and installed it, but it still won't start, and whatever put the kibosh on the original fuse has already damaged the replacement fuse. Which makes sense, because obviously, something caused the fuse to blow in the first place. But I was hoping it was a power fluke.
So unless you have the capability and are willing to go through and check every little component (some require a microscope to see clearly) and are then able to identify and locate a replacement for the failed component, which could take several hours if not an entire day(s) to repair the board, it's replacement of the board ($220 used to $500 new at the time of this posting 4/26/19) or go buy a PC laptop.
There are some outfits that specialize in board repair. They actually use microscope-equipped workstations, and they stock components for these type of boards. Something to consider.
If you're hung up on the MacOS, buy a PC with hardware that closely matches Macbook hardware and make a Hackintosh out of it. But that's a completely different kettle of fish. However, Windows 10 is not too terrible to live with.
Good luck.