A1932 820-01521 DFU error

[hgoncalves]

Hi,

I have an A1932 820-01521 that enters in DFU mode, but always gets an error before the end.

Sometimes it says that he needs to install a software update (on the Mac with the Apple Configurator 2), I start the update, but at the end it says that it can not update , because nothing was found on the server.

Most of the times ends with an error on the img.

Can you help?

 

[2informaticos]

Post an image of the error.

 

[hgoncalves]

Sorry, here it is the ing. I corrected the inicial post also, with adicional information about the update error

 

[2informaticos]

Did you connect known good battery and trackpad?
Tried disconnecting audio flex?

 

[hgoncalves]

Hi.

I've tried now with audio flex disconnected and a good trackpad but still got an DFU error (a different one):

 

[2informaticos]

Try without battery connected.

Any history available?

 

[hgoncalves]

W/O battery I get the same error

 

[2informaticos]

Check diode mode to ground on all secondary power rails.
Compare readings with good board.

Just in case, try DFU shorting 3V3_S5 to ground.