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Hardware Right Joy-Con insertion animation missing

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LuigiGad

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I have this Switch, it had corrosion on both rails and both speakers were dead (never seen before). I replaced everything and everything works except for the right Joy-Con insertion animation, as seen in the video. Needless to say, I've done all the necessary cross-checks and the problem is with the motherboard. Does anyone know how to fix it? Thanks.
 

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LuigiGad said:
I have this Switch, it had corrosion on both rails and both speakers were dead (never seen before). I replaced everything and everything works except for the right Joy-Con insertion animation, as seen in the video. Needless to say, I've done all the necessary cross-checks and the problem is with the motherboard. Does anyone know how to fix it? Thanks.
Click to expand...

I have had this issue before (on the left joy-con); it was caused by a burnt resistor on the serial data (console -> joy-con) line. you might check this area and see if these values are okay. though, I have also seen posts on tronicsfixforum where the issue was on the CPU side, but ultimately did not cause any further issues, as the console is just assuming the joy-con is already connected and waiting to start communication.

joy-con detect.png
 
Thanks for your interest, I checked and everything corresponds to your instructions, there is voltage and the values are correct.
 
what is your diode mode reading for that line? with red probe on ground and black on the 0 ohm resistor, I am measuring 0.480-0.500 across a few hac-cpu-20 boards.
 
Have a had-cpu-10 by hand having right joycon no detection issue,.
On that 100k ohm resistor circuit, the 1.8v didnt get pull down to 0v when joycon connected. I measured the 100k in circuit is around 13k( on a working board is around 60~80k ohm), this is pretty much a cpu side issue for me.


Just not sure if I permanently short this pin to ground would cause any further issue or not
pin5 requires a high to low level switch in order to initializing a handshake, permanently ground pin5(stays low) will not toggle next handshake so joycon will not recognize as handheld model.
 

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Last edited by jkyoho,
LuigiGad said:
I have this Switch, it had corrosion on both rails and both speakers were dead (never seen before). I replaced everything and everything works except for the right Joy-Con insertion animation, as seen in the video. Needless to say, I've done all the necessary cross-checks and the problem is with the motherboard. Does anyone know how to fix it? Thanks.
Click to expand...
The ribbon connector on the mainboard or in the joycon could be corroded. You need to clean everything thoroughly.
 
Last edited by The Real Jdbye,
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The Real Jdbye said:
The ribbon connector on the mainboard or in the joycon could be corroded. You need to clean everything thoroughly.
Click to expand...
As already mentioned, I have done all the cross-checks, I have used different rails of the Switch and they all behave the same way, just as I tried different Joy-Cons
 
The Real Jdbye said:
So you measured continuity between the joycon and the connector pins on the mainboard?
Click to expand...
The Switch definitely has a working rail, just as the Joy-Con rail is also working. Now, if the problem is in the FPC connector of the motherboard, I don't think so because it is in perfect visual condition, but is there a diagram to check the continuity between the Joy-Con and the motherboard bypassing the connector? That way I can check this last thing.
 
LuigiGad said:
The Switch definitely has a working rail, just as the Joy-Con rail is also working. Now, if the problem is in the FPC connector of the motherboard, I don't think so because it is in perfect visual condition, but is there a diagram to check the continuity between the Joy-Con and the motherboard bypassing the connector? That way I can check this last thing.
Click to expand...
If the ribbon cable on the original rail had corroded pins, then the inside of the FPC connector is most likely also corroded but if they were clean you probably don't need to worry about it. Just something important to keep in mind.
 
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