Switch stuck nintendo logo (first logo) M92 3.3v missing

hi all.
I am repairing a water damaged Switch.

When the battery and power were connected, the Pin5 of the M92 was 4.8v and the Pin6 was 0.3v.
I replaced the M92, but there is no change. Just in case, I exchanged it three times from another donor.

I started hekate and checked the battery and eMMC, but there is nothing suspicious. The eMMC also dumped successfully.

Linux boots successfully, but Horizon does not boot.

Do you have any ideas?
Where do you generate the 3.3v of the M92?

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I have the same problem, solved it?