Just want to share my experience.
After I updated the BIOS from version A02 to latest BIOS version R1 A03, I got a "No Bootable Device" error after BIOS successfully updated.
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FAQ & Answers
The new BIOS is probably in 'UEFI' mode, hit delete and go back in, select the 'Boot' menu then change 'Mode' to 'Legacy'
Tried that and did not help.
I called Acer tech support and the unit was sent back for repairing.