Hi everyone,
After reading the many useful posts in this forum while trying to repair a friend's Switch, I have decided to ask for your help. I received the Switch and it was not turning on at all. No boot logo or anything. Therefore, I decided to measure the current being drawn by the console. I measured 15 V and 0.5 A, so I assumed that M92T36 was working fine, since the 15 V indicate that fast charging is active. After that, I decided to connect the Switch to the PC and it was detected in APX mode, so I gave it a try and load TegraRcmGUI and indeed, the console was being detected in RCM mode. I tried sending a payload, but the console is a V1 patched model, so no possibility of running Hekate.
In light of the above, I drew the following conclusion: the Switch is stuck in AutoRCM because there is some problem with the EMMC and it cannot load the OS. I disassembled the console and check for shorts around M92T36 just in case, but everything was looking fine.
What are my options at this point? I read something about rebuilding the NAND, and I saw some adapters to dump the NAND via Linux with an special adapter, but I think that since I do not have the "keys" (prod.keys, master.keys? I still do not fully understand what they are) I cannot decrypt the NAND contents and try to rebuild it.
I have also considered the possibility of soldering some modchip in order to run Hekate and check the status of the NAND, or at least do the NAND dumping to the microSD, but I see many different modchips around Aliexpress and I don't really know which one I should use.
I really appreciate any possible help you can give to this newbie.
Thanks in advance