Hi All., I am working on a Apple MacBook Air A1466 Board # 820-00165-A. It was in for not turning on (DEAD) & SMC getting hot. Upon mircoscopic observation, I saw a little corrosion on one of the caps near the SMC. Checked it, & it was shorted. Replaced it & all worked fine. Now what happens, the keyboard & trackpad work 100% fine in the start, I can even put in the Password & cursor moves fine untill complete boot up. Once it's in the desktop, the keyboard & trackpad give up & by itself it starts to search for bluetooth keyb & trackpad. I put in another SSD with new OS but still the same, upon chime booting keyb & trackpad work fine but when on the desktop, nothing works. Does anyone have any tips on this kind of problem. I totally lost on this. Thanks in advance,
MacBook Air A1466 Keyboard Problem
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Re: MacBook Air A1466 Keyboard Problem
hi. see if this thread helps:
https://boards.rossmanngroup.com/thr...eyboard.18423/ -
Re: MacBook Air A1466 Keyboard Problem
Hi mon2., so in my case I replaced the 4x33ohms R4850~53 resistors & R1665, R1666 & R1667 because the were corroded a bit & relation to SPIs. But still no luck. Then I removed the battery & un-screwed the Trackpad. Checked under the microscope, no liquid spill on the trackpad, just had a six sense to replace this & see what happen, & guess what all worked like charm & normal. Did not believe that the trackpad could cause the keyb & trackpad not to work in OS??? But anyway all problem solved, thanks for the help.Comment
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by Vliegenier04Hi! This Mac has been an headscratcher for me, I can't seem to figure out the issue. The Macbook has gotten water damage to the front of the keyboard connector and battery connector. The keyboard connector was dead, by which I mean it was completely corroded and I have replaced it with a brand new one.
I have verified all the pins are connected to the main board and the main voltages (PP1V8_AONSW_KBD_ISNS and PP3V3_AON_KBD_CONN) are both present, with and without keyboard attached.
Unfortunately, the keyboard does NOT want to work, caps lock LED not functioning as well as any...06-16-2025, 12:03 PM -
by biosdiHi guys.
I Just replaced battery on my MacBook Pro A1989. Unfortunately doing that, I’ve broken the trackpad flex cable (821-01701-a), and I’ve already ordered a spare one. At the same moment I’ve noticed that also the keyboard it’s not working anymore and I’ve found an SMD chip unsoldered and moving freely inside the backplate. I can read L20L on the chip. Is something could explain the keyboard not working or the keyboard doesn’t work due the unconnected trackpad?
thanks...04-17-2025, 09:42 AM -
by iMuhtasebWow it's been a while since I posted!
This is a weird case, it has a history of liquid spill a year ago but customer did not want to replace neither trackpad or keyboard.. fast forward for today:
A2681 turns on but not trackpad or keyboard feedback (or external keyboard and mouse) and then after a minute or so the Mac sleeps..
It's a NOT a sleep sensor or trackpad or keyboard or daughterboard or anything else (I replaced all those); it's the logic board..
Tested another locked logic board on customer's top case and it posted with keyboard and...05-22-2025, 09:59 AM -
by Sierra89Hello!
I've used this forum a lot in the past and always found the information I needed to keep on learning and solving the problems. This time, though, I haven't been able to find what I needed so I wonder if any of you could share it.
I have a 2017 Macbook air A1466 that won't turn on.
I can turn in on with the power pads, and even shorting the SMC_ONOFF_L
line to ground in both sides of the flex cable (mother board and trackpad board), I also changed the whole keyboard assembly to a new one which works well.
All this leads me to think that my problem...-
Channel: Schematic Requests ONLY!
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Hi friends.
This model has a very weird fault.
Macbook Air M1 A2337 - 820-02016
it works for a while and after a few minutes the TRACKPAD AND KEYBOARD stops working
I already formatted, I already changed flex and trackpad. The error continues, I tried with another keyboard and the same error happens.
works for a while and then stops working trackpad and keyboard
(i rebooted and it works again, after a few minutes the failure returns)
THE BOARD LOOKS VERY CLEAN and IMPECCABLE
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