820-00923 touch bar not working

[Soji]

PP1V8_S0SW_DFR=1.797V
PP3V3_S0SW_DFR=3.313V
DFRDRV_12C_SDA=1.797V
MIPID_CLK_CONN_P=0.534V...
Still not working after changing touch bar

 

[2informaticos]

Any history available?
Did you do any checkings related with touchbar issue?

 

[Soji]

The system doesn't wake up from sleep, j5250 is badly corroded i did a bypass solution and it's working fine..
I compare the diode mode reading to ground with good board everything seems fine

 

[2informaticos]

Do you get the critical update error?

Touchbar Critical software update required

I'm just posting this here for reference as this is a common issue and there are many different causes. This is not about the network error but the error that occurred during installation of the update. The critical software update is triggered if during normal OSX boot the T1/T2 chip cannot...

boards.rossmanngroup.com

 

[Soji]

Yes.. I tried it many times before I could get it done after the update touch bar stops working

 

[2informaticos]

So touchbar was working good?
What kind of update did?

 

[Soji]

Touch bar was working before
The critical update that pops up when you're about to activate when choosing language

 

[2informaticos]

So you've installed macOS, critical update error doesn't appear anymore, but touchbar doesn't work?

You've compared diode mode readings with good board.
What about signals level (voltage)?