[help]macbook air 820-01521...seems alive but it's dead! crazy!!

[phantom]

motherboard like new. all perfect!

I have 20v on both ports.

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no fan spin, no caps lock led, trackpad works. no sound. no external video

 

[2informaticos]

Which big coils get voltage?

 

[phantom]

what do you mean?

i've tried to reactivate the mac: it goes from dfu to recovery, than it give me back error 4010! trackpad and battery connected. charger connected

 

[2informaticos]

I could only see 1.6A consumption; possibly with battery connected.

What is the current consumption without battery?
Can you post voltage on the coils?

 

[phantom]

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Without battery

Just because now it is stuck in Recovery mode

 

[2informaticos]

Force it off and put in DFU again.

 

[phantom]

How? Even removing the battery, as soon as I Connect to my mac, it goes to Recovery.

 

[2informaticos]

Pressing power button 10s should turn it off.
Not sure if you can access pure DFU mode with keyboard only.
I do it using external switch method usually.

 

[phantom]

I’ve had access to dfu always through keyboard!!

 

[2informaticos]

You've said it appears in Recovery, not DFU.
Or do you mean that it starts on Internet Recovery mode in fact?

 

[phantom]

I’ve put it in dfu with keyboard, and I have tried to reaactive it with error 4010.

Now, When I simply Connect it with cable, i see it in Apple Configurator not in dfu But in Recovery

 

[2informaticos]

I told you how I proceed in such case.
The problem with your model is that you don't have dedicated pads to solder a switch for SOC_FORCE_DFU signal.
You need to solder tiny wires to corresponding points, on back of the MLB.

DFU Mode Restore (Macs) - LogiWiki

We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area

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Isn't sure anyway if that will fix your problem.

 

[phantom]

You don’t understand: i don’t need Any switch because i can go to dfu mode without problem with keyboard and cable!!!

 

[2informaticos]

"i see it in Apple Configurator not in dfu But in Recovery"

 

[phantom]

I’ve put it in dfu with keyboard, and I have tried to reaactive it with error 4010.

Now, When I simply Connect it with cable, i see it in Apple Configurator not in dfu But in Recovery

Yes because of this. After error 4010, When I simple Connect it to my MacBook, it is seen in “Recovery “ in Apple configurator

 

[2informaticos]

So, I explained you how to force it in pure DFU, not Recovery.

One week ago I had problems with an A1989 and took me various minutes to switch from Recovery to DFU.
It completed DFU restore after several tries (more than 10 times).

 

[phantom]

But I have no problem to switch to dfu mode…

Problem is that I have error 4010… I’ve tried like 5/6 Times…

I don’t know what to do now