Predator HeliosPH315-55-70ZV shows'No Bootable Device',UEFI option greyed out,can't switch to legacy

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tmoe01
tmoe01 Member Posts: 4 New User
edited 4:47AM in Predator Laptops

My Predator laptop had displayed No Bootable Device. The original SSD seem to have been corrupted or died, So I have a new SSD that I want to install Windows on. I have set a supervisor password, I have disabled Secure Boot, and I have enabled the F12 boot option, but the boot mode is still set to UEFI and is greyed out. I have searched around to try and see how to enable this so that i switch over to Legacy mode so it can see the USB. Any help would be appreciated,

Not sure if original post was deleted for TOS violation or if there was an actual answer, but please message me if im doing something wrong. Thanks

[Edited the thread to add model name to the title]

Answers

  • Kiriko
    Kiriko Member Posts: 32 Enthusiast WiFi Icon

    this is a common issue you wil need to download the raid drivers for windows and place them somewhere on the thumbdrive your using once the installer has the correct raid drivers it will see your ssd

  • StevenGen
    StevenGen ACE Posts: 14,656 Trailblazer

    can you include what is your exact Predator Helios 300 model number like PH315-xx so we can give you further advice.

    If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful👍

  • tmoe01
    tmoe01 Member Posts: 4 New User

    Thank You, model number is N22C3 / PH315-55-70ZV

  • Puraw
    Puraw ACE, Member Posts: 17,622 Trailblazer

    Hi, Here's the bullet list I posted earlier for troubleshooting the Predator Helios PH315-55-70ZV showing "No Bootable Device" and a greyed-out UEFI option:

    🛠️ Steps to prep for clean SSD install:

    • Set a Supervisor Password in BIOS to unlock restricted settings.
    • Disable Secure Boot to allow unsigned installations.
    • Enable F12 Boot Menu for manual boot device selection.
    • Confirm your new SSD is recognized in BIOS (under Storage or Information tab).

    📦 Windows Installer Setup:

    • Use Windows Media Creation Tool to make a bootable USB.
    • Download Intel Rapid Storage Technology (RST) RAID drivers from Acer’s support site.
    • Extract the drivers and place them in a folder on the USB installer.
    • During installation, click "Load Driver" and point to the RAID folder when prompted.

    📴 If UEFI is greyed out:

    • Some Acer BIOS versions lock Boot Mode to UEFI when Secure Boot is disabled. Legacy boot might not be supported at all.
    • Try resetting BIOS to defaults, then repeat changes.

    🔧 Other considerations:

    • Make sure the SSD is properly seated and compatible (NVMe vs SATA).
    • Try creating the installer with Rufus in UEFI/GPT mode to match the BIOS.
    • If install still fails, test the SSD on another machine to verify it's functional.
  • StevenGen
    StevenGen ACE Posts: 14,656 Trailblazer
    edited 4:20AM

    Why do you want to switch to legacy mode? Your Predator will NOT work with Win-11 on MBR/Legacy format, as it only works in UEFI mode, as its default format for Win-11 is the GUID (GPT) M.2 SSD format, which the PH315-55 should operate with.

    Leave things on default, make sure that the bios version is up to date and then construct an installation bootable USB with Rufus 4.9 and follow its guide and then put the PH315-55s oem IRST drive version 19.0.1015.0 on the installation USB drive and then start the Win-11 24H2 USB boot drive and at :

    Where do you want to install windows? > Load driver > install the IRST drive above as then you will be able to continue and install the Win-11 OS

    where do you want to intall windows.jpg

    After clicking on Load driver > you install the IRST driver as you will get a similar screen like below:

    Screenshot 2025-07-04 104958.png

    As after you do all the above, it should recognize the new M.2 SSD drive and you will be able to install Win-11 24H2 version and all its update to OS build: 26100.4484, do all the above as it will work, good luck and hope this helps you out.

    If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful👍

  • tmoe01
    tmoe01 Member Posts: 4 New User

    I was going by what I found on Google and Reddit, I will try these steps and let you know what happens.

  • tmoe01
    tmoe01 Member Posts: 4 New User

    GM StevenGen, I feel like I am missing something in your steps. I put the BIOS back to the default, with the exception of the F12 boot menu, I created the bootable USB with Rufus, put the IRST drive on the USB, and I added the latest version of BIOS(1.10, I have 1.07). If I go to the Boot Menu, there is no boot option available. If I go into BIOS and go to Boot, the Boot Priority is blank. If I go to Security > Select an UEFI as trusted for executing I can see the USB and all the files, but when you drill down into them they only lead to < . >(which doesnt do anything) and <.. >(which after drilling down goes back to the USB menu). I'm sure that there is a step I'm missing…

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  • Kiriko
    Kiriko Member Posts: 32 Enthusiast WiFi Icon

    you may need to run rufus again but make sure the drive is formatted in GPT or it wont appear if i had a usb drive near by i would show what you would need to change