Samsung Chromebook User Manual page 35

Chrome OS
2
Open the LCD panel and press the power button to turn the
power off.
3
Insert the SD card or the USB flash drive containing the
recovery image, and press both the Refresh button and the
Power button while holding down the ESC key.
4
When the Chromebook restarts, follow the onscreen
instructions to complete the recovery process.
5
Remove the SD card or the USB flash drive as instructed.
6
When the system has restarted, the update is successfully
completed.
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