100e (Chrome OS is Missing or Damaged.) Check Reason with the "Tab" Key
If you get the message "Chrome OS is missing or damaged. Please remove all connected devices and start recovery" press the "Tab" key
If the reason is "0x5a No bootable storage device in system", this indicates a defective logic/motherboard and is not repairable.
If the message is different than 0x5A try restoring using the USB/SD recovery method.