"How can I reset a managed chrome book back to factory"に関する回答In addition to my answer, I shorted my TPM chip and downgraded as far as I could. But, I ended up shorting the wrong pins and smoke came up. The chromebook still works, just can’t detect the chip properly anymore and that’s what allowed me to access developer mode and change the serial number.
"How can I reset a managed chrome book back to factory"に関する回答Have you guys ever tried downgrading to the lowest version your device supports? Then trying the old bypass methods? Worked for me on a Dell Chromebook 11 3120 (Candy).