[Nintendo Switch Oled] Black screen after Nintendo logo

My Nintendo Switch Oled won’t fully boot, it just showing Nintendo logo and then just black screen

I assume there’s problem with the nand, but when I install picofly rp2040 to rebuild the nand, the chip gives me double short error (**) instead which means RST/B point was not connected and still give me black screen after Nintendo logo

I did check the RST/B point, but there’s continuity between picofly to the switch

Can anyone help me figured out what’s the problem with this switch?