Hello,

I will to try to explain the problem:

I get a 2nd hand Nintendo Switch with water damage. After my inspection I can see few water damage in (and around) usual chips (corrosion in M92T36, BQ24193, PI3USB) and battery connector (and bottom PCB in same area) then I clean the PCB and check some weldings, all looks like ok.

I don't know the installed firmware. Only shows Nintendo logo then turns off.
I can test that can charge with an usb tester but don't shows the charge icon in the screen.

I checked the capacitors (and others) around M92T36, BQ24193 and PI3USB for any issue and all looks like ok.

I can join in RCM mode but when I try to launch Custom or Oficial firmware I have the same problem, only "Nintendo" logo and off.
I try to restore BOOT0, BOOT1 and RAWNAND extracting my own keys downloading and using an original firmware with TegraRcmGUI v2.6, memloaderv3, HacDiskMount1055 and ChoiDujour122b following this tutorial:



Following the tutorial all looks like ok but when I mount rawNAND in TegraRcmGUI with memloader and I went to HacDiskMount step (minute 00:44) I can see something different, in the video the boy just mount sysNAND and ok but in my switch appears a message that tell me "Please select partition table. Primary and backup GPT are both valid but not the same, which one to use?" I don't know which is the correct so I try it with "Primary", then I finish the tutorial and no repaired, then I repeat with "Backup" and same problem.
I try different firmwares (v9 and v6) and same problem.

Now I can't see "Nintendo" logo and it's more difficult to join in RCM mode. What happened? How can repair my Switch?

I have a NAND backup with the initial problem before do all this things.

The chips looks like ok but I thing that I need to try to change it, because it's strange no see the charge icon.

Some ideas?

I appreciate some help.

Regards.