ACER Aspire es1-521 won't boot after bios upgrade

whathasidone
whathasidone Member Posts: 1 New User
edited March 2023 in 2017 Archives

I update my aspier es1-521 note book to bios 1.07 (B5W1E107.exe). After boot it shows "no bootable device" warning. I did change the boot method to legacy which kind of fix the not booting problem. But now touchpad buttons are not working. How can I change it to UEFI or even downgrade the bios ?