820-01958 A2179 dead only Fan Spin from time to time

[2informaticos]

Shouldn't lose the connection, if AWAKE and SLPS2R voltages are steady, when battery is connected.

 

[Sn0w3y]

Could you please tell me the exact Voltages ? Like the Names of them to Check ? All of Them ?

 

[Sn0w3y]

PP1V2_AWAKE drops to 0 1 sec. before Error.
PP1V8_AWAKE drops to 0 1 sec. before Error.
PP3V3_AWAKE drops to 0 1 sec. before Error.

Just a little Edit: It only lets itself start into Recovery Mode..

 

[2informaticos]

Machine starts in Recovery Mode and stays on for long time?
Read the DFU tuorial linked on the forum and try to follow all its steps exactly.
Other people complained about autostart in Recovery Mode, but they finally succeed to put it in DFU.

AWAKE voltages drop even with battery and charger, both connected?

 

[Sn0w3y]

Yes both connected, then they drop and Come back again after a half a second

 

[2informaticos]

Any fault history available?
Check for liquid sign; especially on the audio board.

 

[Sn0w3y]

I finally got into DFU Mode now. No Fault History available and no Liquid Damage sign..

EDIT: I tried to Revive the Device via: Actions > Advanced > Revive Device but it shows Error 75 "Missing Data Volume"
If i try to "Recover" it in DFU Mode it brings up the old Error with: "the Device was either disconected or connected twice." Device added from invalid state Restoring.. I have no clue why this Error shows up..

 

[Sn0w3y]

This is what Shows up after DFU Restore

 

[2informaticos]

You may have a problem with internal SSD.
Can you access it in Target Disk mode?

 

[Sn0w3y]

I tried. I set one Mac in Target Disk Mode and connected it via USB-C. Then i tried to boot up our defect one with "Option" or "T" Key (i tried both)
Not possible..

 

[2informaticos]

Can you start Internet Recovery?

 

[Sn0w3y]

No unforunately i have no Picture since DFU & Recovery Mode try.

 

[2informaticos]

This looks more like T2 internal problem.

 

[Sn0w3y]

But how to Check or proof? Why did I See the Apple Logo with the Loading Thing on the display and after setting it in DFU to try to Revive it it does only show up in Recovery mode..