Switch V1 RCM not working after Battery replacement

[Harak]

Hello,

I have a V1 Switch from a customer and I replaced the battery because it was faulty and renewed the thermal paste. After that, the RCM loader is not working. I really don't understand it. I definitely did not knock off anything or damage anything. I only disconnected the battery and SD card reader. The customer says everything worked before. Is he lying?
OFW works perfectly fine. Charging is also working, but the RCM loader is not. Even with Tegra RCM, the Switch is not recognized by my PC with an original Nintendo USB-C cable.
What am I doing wrong?

Thanks in advance.

 

[Hayato213]

Did you power it on before you swapped the battery?

 

[Harak]

To be honest I am not sure. I dont think so. Does it matter?

 

[Hayato213]

Well the problem is that you didn't test before you replaced the battery, the customer can claim you broke it

 

[tbb043]

If it's booting into OFW doesn't that mean you don't have auto RCM installed and need to use a jig?

 

[Harak]

I have also a jig. But it does not work.
Yeah next time i will definetly try everything before.
But as i said. Ofw is working fine. But why is the jig not working.

 

[Krafter]

I have also a jig. But it does not work.
Yeah next time i will definetly try everything before.
But as i said. Ofw is working fine. But why is the jig not working.

This may be a silly question but did you run the serial number to verify that its not patched?

 

[Harak]

This may be a silly question but did you run the serial number to verify that its not patched?

Yes!

 

[rip-it-up]

check the filter above the usb port (near the ram)
also check the test pints below it for a diode reading,

will it charge with a 5 volt charger?

you can also take the emmc out, and see if it automatically goes into rcm

 

[Krafter]

Yes!

Just asking the obvious lol. I have a bad habit of overlooking the obvious sometimes.

 

[Harak]

check the filter above the usb port (near the ram)
also check the test pints below it for a diode reading,

will it charge with a 5 volt charger?

you can also take the emmc out, and see if it automatically goes into rcm

It is charging normally. I will check all pins from the usb c port today and will try that tip with the emmc out.
Will keep you updated. Thanks in advance.

 

[plasmagrass]

Can you confirm that the USB C connector behaves correctly? It's not enough knowing that you can charge your switch. is it recognized as a proper USB device? I would do this first before touching the hardware even more.

> the Switch is not recognized by my PC with an original Nintendo USB-C cable.

Do you have a "device not recognized" error on your PC, or are you having nothing at all?

If you have nothing at all, then most likely the connection from the usb port to whatever resistor on the usb device is damaged.

If the PC recognized that it's a USB device but doesn't know what it is, then the broken trace are probably closer to the CPU

 

[Harak]

A little late Update.

Usb C is charging as mentioned but some Pins are showing different values in diode mode compared with a known good one.
Checked also contuinity and those looked good so sonething on the baord must be failing. After opening I found a bad filter. I will replace it and will keep you updated afterwards.

 

[fvig2001]

Wouldn't be surprised if the USB-C port is crapping out. I bought a used hacked switch that ended up killing itself when I connected it to the dock.

What I would try would be to:

Install an rcmx86 and connect the thing that shorts the required pins for RCM and see if it launch hekate. At least that would bypass a bad USB-C port.

Otherwise if no RCMx86, get a USB-C female breakout board and connect the 4 pins to the 4 USB-C related pins and connect the dongle to the female USB-C port of the breakout board.

 

[Harak]

Wouldn't be surprised if the USB-C port is crapping out. I bought a used hacked switch that ended up killing itself when I connected it to the dock.

What I would try would be to:

Install an rcmx86 and connect the thing that shorts the required pins for RCM and see if it launch hekate. At least that would bypass a bad USB-C port.

Otherwise if no RCMx86, get a USB-C female breakout board and connect the 4 pins to the 4 USB-C related pins and connect the dongle to the female USB-C port of the breakout board.

I have no clue what a rcmx86 is but i googled it. I dont have that board. Just the rcmloader. I have a breakout board. But I think it is worthless without the rcmx86.

Usb c port looks good. I will check it with the microscope in the evening

 

[fvig2001]

I have no clue what a rcmx86 is but i googled it. I dont have that board. Just the rcmloader. I have a breakout board. But I think it is worthless without the rcmx86.

Usb c port looks good. I will check it with the microscope in the evening

You're literally just connecting the rcmloader to the 4 usb-c pins of the switch without having to soldering the RCMLoader directly to the switch.

Point is to check that the USB-C port of the Switch is broken or not.

 

[Harak]

You're literally just connecting the rcmloader to the 4 usb-c pins of the switch without having to soldering the RCMLoader directly to the switch.

Point is to check that the USB-C port of the Switch is broken or not.

As I said I checked the Usb C Port regarding continuity and diode Values. Continuity is good but diode values are bad.
Long story short replaced the filter which are connected to D+ and D- Pins and Rcm Loader is working perfectly fine.
The question is now, did the Client know the problem and tried to fool me or did i destroyed a filter during the replacement.
Nevertheless thread can be closed. Thanks to all of you.