BEFORE you put the Chromebook into developer mode, the Read/Write screw AND sticker must be removed from the motherboard. See pictures below.

Once the Read/Write sticker is removed placed the bottom plate on, but do not screw it down, it has a higher success rate without the screws of the bottom plate screwed in, and just in case you have to get back to the motherboard and re-clean the copper. Continue to the next page and follow the steps in order to change the Serial Number of the Device.

Get to developer mode: Chromebook XE503C12

On this device, both the recovery button and the dev-switch have been virtualized. Our partners don't really like physical switches - they cost money, take up space on the motherboard, and require holes in the case.

To invoke Recovery mode:

• • Plug the DC Power in

• • Hold down the Esc + Refresh + Power until the display turns on then release.

  • At the screen that says the “Chrome OS is missing or damaged”, press Ctrl + D then Enter.

  • At the screen that says “Chrome OS verification is turned off”, press Ctrl + D, the device will restart and progress into developer mode.

  • Do not touch or do anything for 10-15 minutes until it progresses back to the “Chrome OS verification is turned off” screen, then press Ctrl + D

  • Wait until the device boots to the Chrome start screen, Press Ctrl + Alt + → (Ctrl-Alt-F2)

Once in the command prompt continue to the next page, if not in a command prompt retry the above steps.

Once in developer mode: Chromebook XE503C12

Type as shown below, if it’s Capital leave it Capital, if its lowercase leave it lowercase. Spaces are important make sure if there is a space you type it in the terminal.

• Type: chronos

  • Press Enter

• Type: sudo su

  • Space after “sudo”.

  • Press Enter

• Type: vpd -l (lowercase L)

  • Space after “vpd”.

  • Once you type vpd -l, this will display the current motherboards information including the motherboards current serial number.

  • Press Enter

• Type: vpd -s “serial_number”=”0000000000”

  • Replace the 000’s with the Device Serial number from the original device

  • Space after “vpd”, Space after “-s”.

  • Make sure the serial number is CAPITAL letters.

  • Press Enter

• Type: vpd -d “Product_S/N”

  • Space after “vpd”, Space after “-d”.

  • Press Enter

• If flashromPartialWrite() error displays go back to the Read/Write Copper where you have removed the sticker and re-clean the area with alcohol and try again. Make sure you shut down the chromebook and remove the battery before cleaning.

• Type: dump_vpd_log --force

  • Space after “dump_vpd_log”.

  • Press Enter

• Type: dump_vpd_log --full --stdout

  • Space after “dump_vpd_log”, Space after “--full”.

  • Press Enter

  • To close the command line session, type EXIT to close shell and EXIT to close the terminal.

  • Leave the device in developer mode once the repair is completed, so that the QC Team can Verify the SN Change.