Hey,

A friend has found his old 2011 Macbook Air 11" so we decided to test it out so we connected the MagSafe 1 charger (not genuine apple) and then No green light the unit wont turn on if i press the power button. i have experience in device repair so we can repair if necesary we are thinking seeing if its an issue with the charger first then if that dosent work we arent sure what to do

If you have no light on the magsafe plug, try to find another magsafe 1 charger (could be the simple fix of a different charger...), and is the easiest test. If another charger also has no light, then could be the magsafe connector on the MBAir - which is the I/O board. iFixit.com has the part, and the steps for replacing it. If that does not fix it, then you likely will need to replace the logic board (deciding if it is worth the $ to fix a 12-year-old laptop.

DeltaMac said:

If you have no light on the magsafe plug, try to find another magsafe 1 charger (could be the simple fix of a different charger...), and is the easiest test. If another charger also has no light, then could be the magsafe connector on the MBAir - which is the I/O board. iFixit.com has the part, and the steps for replacing it. If that does not fix it, then you likely will need to replace the logic board (deciding if it is worth the $ to fix a 12-year-old laptop.

could it be a battery issue or is that unlikley

Joshmacbookpro2015 said:

Hey,

A friend has found his old 2011 Macbook Air 11" so we decided to test it out so we connected the MagSafe 1 charger (not genuine apple) and then No green light the unit wont turn on if i press the power button. i have experience in device repair so we can repair if necesary we are thinking seeing if its an issue with the charger first then if that dosent work we arent sure what to do

Might be charger, cable, battery or logic board. test one by one

The battery is unlikely. A dead, or missing battery would not make a difference with the LED on the magsafe connector. You would still get something--some kind of light when the magsafe is plugged in.

MagSafe 1 charger (not genuine apple)

This is the start of your issues. One can only guess as to what is inside. Highly recommended to use the Apple original as the original has a soft start that prevents major damage to the logic board.

The single wire communication (by Dallas / Maxim Semiconductor) is used to extract the power adapter's details and respectively toggle the green / orange light inside the external adapter. Many of the clones do not do this and just offer a led that turns on / off. Also, often, the high adapter voltage is always hot at the magsafe contacts - unlike the real deal by Apple (Foxconn / Liteon) - they are using a small amount of current to detect if the adapter is mated to the logic board before kicking into the full voltage mode.

Check your magsafe contacts. Clean them with IPA (Costco pharmacy stuff is great).

If you still do not see the light turn on, then you will have to open up the unit and review the logic board details.

Suggest to open a fresh thread on the badcaps website for laptop repair but in summary:

Check the voltage to ground of the PPBUS_G3H and 3v42 rail. Specifically the 2nd voltage which is used for the single wire communication.

In your reply, do post the logic board details - share the 820-**** number from your PCB.