You must use a specialized "RCM Jig" in the right Joy-Con rail while holding the and Power buttons.
He slumped in his chair, heart hammering. He opened the hex dump, scrolling to the KEYGEN_PRESEED . It was a beautiful string of random bytes. With this, he could sign custom firmware, bypass any eShop check, run Linux natively, even emulate other Switches with perfect fidelity. nintendo switch bios
Boot signature verified. He was in.