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820-01598 - Only turns on if battery and touchpad is disconnected.

R

ronaldo

Member
Hi, everyone.
Hope you can give some light on this issue.
Got this MacBook with no display.
When disconnecting the battery and touchpad it boots to the system, but if either is connected it will not display, or sometimes the Apple logo and kernel panic.
I've replaced the touchpad and battery and still have the same issue.
Tried to revive it and got this message

The operation couldn’t be completed.
(AMRestoreErrorDomain error -1 - Failed to handle message type StatusMsg (Generic error))
[AMRestoreErrorDomain – 0xFFFFFFFFFFFFFFFF (-1) [sys = 0x3F, sub = 0xFFF, code = 0x3FFF (16383)]]

Now I f up the T2 firmware and it won't boot any more.

Can someone help me, please?
 
Last edited:
R

ronaldo

Member
I've tried to restore and revive and no results.
The problem now is that it won't turn on even with batt and touchpad disconnected.
T2 firmware is corrupted.
Any ideas on this, please?
 
R

ronaldo

Member
I've tried to dfu revive and restore in many ways. With and without battery, touchpad.
Nothing works.
I've connected everything and done dfu revive and halfway in the process I've disconnected the battery flex cable.
It went all the process and back to life. But still same issue.
Turns on and goes to the system only with battery and touchpad disconnected

I've swapped the logic board on another complete, fully working mac and the problem is the same.
 
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R

ronaldo

Member
C7020 – 3.3 ohms
C7023 – 2.7 ohms
I could not install the system again on internet mode.
Every time it goes to globe and after Apple logo it reboots.
I enter in Target disk mode and cloned the system from another mac, and it boots to the system again. (Battery and Touchpad disconnected)
Only battery connected no display and looping, fan swoosh high speed every 1 minute.
Only touchpad connected, it shows Apple logo and them message this mac restart because of a problem.
 
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