Operating system not found, cannot enter bios or boot to usb

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  • gagarasta
    Member
    • Mar 2019
    • 20
    • Indonesia

    #1

    Operating system not found, cannot enter bios or boot to usb

    Hello everyone, I had issues on my laptop acer 4752G

    I'm using windows 10 until I decided to install windows 7 because of old hardware limitation, then I just found I cannot access my bios anymore. So far I already try these:

    1. On system information its uefi not bios/legacy
    2. Advanced restart but there's no uefi setting
    3. Try to reinstall my pc using fdd but cannot enter boot selection
    4. Press f2 f8 f10 only beep but straight into boot
    5. Try reflash bios using fdd fn key+esc+power not success
    6. Take the cmos battery off and wait 5 minutes and reinsert, no success
    7. Reformat hdd in hope bios can boot into another device, this is where I messed up
    8. Clone hdd with windows 10 to my laptop still not detected

    After acer logo boot "text operating system not found" text appeared

    I really avoid reflashing bios chip since I work far away from home.

    Any suggestion to try everyone? Thank you.
  • petehall347
    Badcaps Legend
    • Jan 2015
    • 4422
    • United Kingdom

    #2
    Re: Operating system not found, cannot enter bios or boot to usb

    remove battery and try again pressing f2 ..if no go reseat the memory

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      Re: Operating system not found, cannot enter bios or boot to usb

      Try legacy seetings in bios.

      Comment

      • gagarasta
        Member
        • Mar 2019
        • 20
        • Indonesia

        #4
        Re: Operating system not found, cannot enter bios or boot to usb

        still cannot enter bios, I reseat memory too even change them.
        Last edited by gagarasta; 11-05-2023, 11:10 PM. Reason: miss quotes

        Comment

        • gagarasta
          Member
          • Mar 2019
          • 20
          • Indonesia

          #5
          Re: Operating system not found, cannot enter bios or boot to usb

          Originally posted by mcplslg123
          Try legacy seetings in bios.
          Yes but the main problem is I cannot enter bios

          Comment

          • adamski1952
            Senior Member
            • Oct 2021
            • 93
            • england

            #6
            Re: Operating system not found, cannot enter bios or boot to usb

            If you try booting up with the cmos battery removed you may get the option to hit f1 to continue. or f2 to enter set up.

            Comment

            • Sephir0th
              Badcaps Legend
              • Oct 2020
              • 1246
              • Germany

              #7
              Re: Operating system not found, cannot enter bios or boot to usb

              Try with external keyboard
              FairRepair on YouTube

              Comment

              • gagarasta
                Member
                • Mar 2019
                • 20
                • Indonesia

                #8
                Re: Operating system not found, cannot enter bios or boot to usb

                Originally posted by adamski1952
                If you try booting up with the cmos battery removed you may get the option to hit f1 to continue. or f2 to enter set up.
                Nice suggestion, I removed the cmos battery after 30 minutes turn it on without battery, but still booting like before cant enter bios ony beep when I press f2. Thanks anyway

                Comment

                • gagarasta
                  Member
                  • Mar 2019
                  • 20
                  • Indonesia

                  #9
                  Re: Operating system not found, cannot enter bios or boot to usb

                  Originally posted by Sephir0th
                  Try with external keyboard
                  Yes I did

                  Comment

                  • gagarasta
                    Member
                    • Mar 2019
                    • 20
                    • Indonesia

                    #10
                    Ok guys, in the end I flash the BIOS Chip and everything is ok now, I really don't understand why the BIOS corrupted though, maybe about efi/uefi - mbr/gpt missmatch installation. There is a way that I miss to try, that is editing efi/uefi from cmd.

                    again, thank you everyone, this problem solved.

                    Comment

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