I have a MacBook Air early 2014 (820-3437-B logic board) will not power on? tried the usual resets but still no go. Not sure what happened to it but likely water damaged I picked it up off Kijiji. The board looks clean no sign of corrosion. I did notice that the Magsafe light goes from green to orange without a battery connected?? not normal. but what are the probable causes for this. Not sure where to look?? Any help greatly appreciated. also noticed that the flash drive feel worm when the magsafe is connected even though it will not power on
Macbook Air Model A1466
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Re: Macbook Air Model A1466
Update". according to the lady I bought it from it was left running for quite some time on her bed and when she returned it was black screen (shut down) and no response from it since. A Mac Tech told her the logic board was gone. I suspect thermo sensors properly to CPU? Feed back please.Last edited by davg; 01-31-2017, 07:43 AM. -
Re: Macbook Air Model A1466
This is PPBUS_G3H ISSUE. Check Voltage at L7130 . You will probably get 8.6V. This is correct and it goes to F7140 from here. Most likely this fuse is open. Solved a case recently with the very same behaviour on this particular model.
I'm attaching the relevant part of schematic.
Hope this helps you.
GoodluckAttached FilesComment
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Re: Macbook Air Model A1466
This is PPBUS_G3H ISSUE. Check Voltage at L7130 . You will probably get 8.6V. This is correct and it goes to F7140 from here. Most likely this fuse is open. Solved a case recently with the very same behaviour on this particular model.
I'm attaching the relevant part of schematic.
Hope this helps you.
GoodluckComment
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Re: Macbook Air Model A1466
This is PPBUS_G3H ISSUE. Check Voltage at L7130 . You will probably get 8.6V. This is correct and it goes to F7140 from here. Most likely this fuse is open. Solved a case recently with the very same behaviour on this particular model.
I'm attaching the relevant part of schematic.
Hope this helps you.
GoodluckComment
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Re: Macbook Air Model A1466
If I disconnect the battery plug in the magsafe and hold the power button the fan will run I can than plug the battery back in and I can than use the power button to turn it on and off but it is only the fan running no chime no video just the fan running at a fast speed. If I reset the SMC it just wouldn't turn on again until I once again disconnect the battery plug in the magsafe and hold the power button for about 10-15 seconds or until fan turns on. What's up with thatLast edited by davg; 01-31-2017, 02:12 PM.Comment
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Re: Macbook Air Model A1466
If I disconnect the battery plug in the magsafe and hold the power button the fan will run I can than plug the battery back in and I can than use the power button to turn it on and off but it is only the fan running no chime no video just the fan running at a fast speed. If I reset the SMC it just wouldn't turn on again until I once again disconnect the battery plug in the magsafe and hold the power button for about 10-15 seconds or until fan turns on. What's up with thatComment
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by soflesHello there
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by psdavid65I received a 2013 Macbook Air A1466 820-3437-B motherboard with serial number C02L6GQ9FSV8 that came in WITHOUT a bios chip. I got a new bios chip and reprogrammed it. Macbook now powers on but doesn't boot the SSD. I've flashed a ton of bios but still same problem. Windows installation works with this Macbook but never a mac installation. Unfortunately, since I didn't receive this macbook with a bios chip, I don't have the original bios. What can I do now?...
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by StrolchHello, I have a MacBook Air that got some liquid! It worked again, but now it won't load or start with the power adapter! As long as the battery is still charged, the MacBook works normally on battery! But not with a power supply. There is also no green or orange light at the plug! Not even with another Magsafe. Even a new DC power board does not work. It's probably the logic board! Need help. Thanks
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by dbuergiHi all,
i got a A1466 with serious water damage. I was able to clean the whole board and only found a fuse with a coroded trace. Cleaning and resoldering did the job and the macbook started normal but after some time the screen began "flashing" like turning on and off while the Macbook was still running. I checked the board again but was not able to find the problem until now.
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