What to do about "No Bootable Device" when booting and Boot Mode is greyed out in BIOS.

Hello, I recently tried to use my Laptop however it says that there is not bootable device when booting, I troubleshooted this problem but none of the fixes (e.g. F9 in BIOS, restoring system defaults, Storage Drivers upon windows installation, changing the Port the physical SSD is in) seemed to work.

Moreover, I am unable to do one of the recommended fixes (changing from UEFI to Legacy Boot), as the entire Boot section of the BIOS is greyed out and all I can do is enable and disable secure boot, all the fixes for this I have tried have failed.

If any of you have had this same problem or a similar problem in the past, any help is greatly appreciated

All that I know is it stopped working after being disconnected from HDMI, however I am yet to find anyone with a similar problem

Thanks.

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Alejandro_AC

Hi @BredInFrench did you try this too?

How to Restore Windows on Acer Computers Using Alt + F10 on Startup - Acer Community

BredInFrench

https://community.acer.com/en/discussion/comment/1181104#Comment_1181104

Yes I did, however sadly this also did not fix my issue :( thanks for the help though :)

StevenGen

https://community.acer.com/en/discussion/comment/1181164#Comment_1181164

What is your laptops model number and is it a 2.5"mechanical drive or an SSD drive or is it an M.2 SSD drive. As 98% of times when you get a No Bootable Device its hardware related and its with mechanical 2.5" HDDs especially, that are faulty, and their format and their page files have errors or these boot drives startup files are corrupted.

Get the installation Win-10 USB and boot into the Advanced options and use the Startup Repair, if that doesn't work then go to command prompt in the Advanced option as in the case of GUID (GPT) formatted drives, you must first mount the EFI System Partition (ESP) and then repair it as such, look at this guide here. if all this does not work and if you have valuable data on your drive, get a professional data recovery tech to recover all your data and buy a new drive and reinstall windows.

billsey

That 'change to legacy' fix hasn't been valid for many years, legacy mode was for Windows 7 vintage OSes and isn't used anymore due to the propensity of rootkit viruses on those systems. Likely the drive has either failed or your EFI partition is corrupted. Try Steven's suggestions and also use diskpart to view the partitions on the disk. If the disk isn't available to diskpart we know for sure the drive has failed.

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