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Acer Chromebook 14 CB3-431 P4GCR REV 2.1 BIOS

its possible,

1. make backup original bios

2. download and run this script under ChromeOS, from a terminal/shell type:
cd; curl -LO mrchromebox.tech/firmware-util.sh
sudo install -Dt /usr/local/bin -m 755 firmware-util.sh
sudo firmware-util.sh
and press enter. (copy/paste these to avoid typos)

 

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