Fixing a broken Switch. Wifi BCM4356

[Acidcoolxxx]

Hello folks

Here's an idea.

My schwitch doesn't boot and gets stuck.
I have tried android and i can boot it everything works except the wifi.
After i swap the chip the wifi still doesn't work.
While searching for the error I found out that you have to program the chip.
Can someone please post the dump you have according to these instructions?
https://www.cypress.com/file/298136/download

This may save many Switches without the need of a donor Board. Just need to write the OTP Memory so the BCM4356 is configured properly.

 

[techjunky90]

You will get better support over on gbatemp.

 

[Acidcoolxxx]

Using Droid Info i read out my sys Info. There is a point "WIFI:Yes"
I have installed Terminal info to get some more infos.
Using the command lspci i was able to get the device id: class 0280: 14e4:4354

here are some opensorce drivers for the 4354
https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx

As you can see the Wifi is not broken or cant be found. It is there but i need to find how to debug the wifi what is really going on.
because if I dumpsys it show me in CHipset information
Version is: null
driver version: null

Im a newbi on android. Maybe someone can me give some options/help.

 

[bylaws]

Can you join the discord, I can discuss there (link is on the twitter bio)

 

[hakr4life]

I am in similar situation. I was running 9.1 Atmosphere and everything was working fine. I used the homebrew app to update atmosphere rather than downloading on my computer manually updating. I honestly knew better but did it anyway. Atmosphere supposedly updates, reboots, I inject my payload, hangs on switch logo.
android: No wifi. bluetooth works fine
Ubuntu: no wifi
Downgraded switch to 5.x.x. No Wifi, bluetooth ok
Restore backup of 9.x.x: boot hangs on switch logo
downgrade again and start updated 1 version at a time. eventually find that every version works(no wifi) until I go to 9.x
So Im stuck on 8.x.x with no wifi and no gamecard slot (switch was on 9.x before I modded)

GBAtemp suggested that my BCM or a component near it could be damaged and I do have the tools to open it but my gut tells me this is a software issue not a hardware issue.

OP If you are able to run android but not Horizon/Atmo I used this to downgrade:
https://switch.homebrew.guide/usingcfw/manualchoiupgrade

Also included picture from me trying to see the wireless card via terminal in ubuntu but I am terrible with linux so I dont know how to do much without instruction