Hardware Stuck on joycon screen: Help tracing a short

[Krost]

Hi guys, I have a Nintendo switch stuck on joycon screen:



By inserting the joycons nothing happen.
On the 2 ICs behind the joycons connector, and on another one, I found these shorts to ground that should not be there:

Spoiler: Shorts

(imgur album: imgur(dot)com / a / biRxi2Y

These are some info and what I tried:

• Joycon rails are fine
• Joycon connectors seem fine
• Removed all three ICs, short still there
• Removed M92, short still there

I could not find where these ICs are connected. Any ideas? Thanks!

 

[thesjaakspoiler]

Capacitors and filters can also cause a short.
I see those repair guys always check the capacitor for shorts.
Those thingies with 4 pins are filters (2 filters in 1 package).

 

[Mr Skinner]

Hi guys, I have a Nintendo switch stuck on joycon screen:

View attachment 251763

By inserting the joycons nothing happen.
On the 2 ICs behind the joycons connector, and on another one, I found these shorts to ground that should not be there:

Spoiler: Shorts

View attachment 251765
View attachment 251766
View attachment 251767
View attachment 251768

(imgur album: imgur(dot)com / a / biRxi2Y

These are some info and what I tried:

• Joycon rails are fine
• Joycon connectors seem fine
• Removed all three ICs, short still there
• Removed M92, short still there

I could not find where these ICs are connected. Any ideas? Thanks!

Did you get any results on this friend? I have a joycon on the right side that does not detect it plugged into the switch.

 

[Krost]

Did you get any results on this friend? I have a joycon on the right side that does not detect it plugged into the switch.

Yes, I fixed it. In my case, it was this shorted diode (or cap, don't remember) located between the LCD and Fan connectors:

Spoiler: Image

In some boards it's not even present. So maybe check also all the components in the previous post.
Good luck!

 

[JLO64]

It’s worth noting that this problem can be somewhat alleviated in software through a hex edit (link below). The issue with this solution vs a hardware fix is that you can’t really use your Switch with the joycons docked.


https://gbatemp.net/threads/how-to-skip-the-connect-joycons-system-init-screen.559745/

 

[urherenow]

Yes, I fixed it. In my case, it was this shorted diode (or cap, don't remember) located between the LCD and Fan connectors:

Spoiler: Image

View attachment 300846

In some boards it's not even present. So maybe check also all the components in the previous post.
Good luck!

Wow... I'm surprised you fixed it. Your screen's ribbon cable looks tore up. What the heck are you doing to it?