How can I know if it is something going on with the chip itself?
If the glitch fails or either flex is removed (Tegra flex and board points flex) the console will read the MicroSD no problems.
Just to be sure I replaced the audio/cartridge/SD daughterboard and tried with another SDs. Also replaced the board connector just in case and the same keeps happening.
It does glitch and get the “No SD” screen. With an SD inserted, I get the “Couldn’t init SD” screen.
Also, after a succesfull glitch, if I press + and - to get into OFW, it won’t pass the “Switch” logo if a MicroSD is inserted, once the SD is removed it will boot normally.
Again, this only happens after a succesfull glitch. If it fails (I remove Dat0 to force a fail) or the chip is removed, the console will work perfectly and read/ copy from and to any MicroSD.