acer v3 771g cmos jumper is not resetting password

Discussion in 'BIOS Mods' started by helmidragon, Jul 23, 2013.

  1. helmidragon

    helmidragon MDL Novice

    Dec 20, 2012
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    Hello ,
    i forgot my password for bios , i have two main problems :
    -bios is not recognizing boot device and show message " No Bootble device , Hit any key"
    -my bios is protected by password wich i can't remember, i tried cmos jumber but it's not working and still demanding password
    -other method including utilies will not work because bios is not recognizing any bootable device (hdd, flash...)

    - it think this bios update is related to the issue because i used it
    BIOS - UEFI for Windows 8 (Not for Upgrades) 2.21 3.0 MB 2013/05/13

    -Boot manager is empty list !!!
    -tried removing cmos battery and then using cmos jumper but nothing (i gess it's not an erasble bios or somthing)
    -somthing to do with secure boot UEFI from my researches


    Please help my i lost hope, i tried evreything i can , what should i do
     
  2. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    remove cmos batt and short the + and - terminals of it while pressing power.. no power of course.

    disable secure boot or EFI boot to boot MBR devices not EFI
     
  3. helmidragon

    helmidragon MDL Novice

    Dec 20, 2012
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    thanks for your help, but no luck with that

    update :
    - it think this bios update is related to the issue because i used it
    BIOS - UEFI for Windows 8 (Not for Upgrades) 2.21 3.0 MB 2013/05/13

    -Boot manager is empty list !!!

    -cmos jumper is not working ?? what should i do because without access to bios i will never know what is the problem
    -is there any kind of master passwords or somthing that can help


    update :
    -used methods on service manual for clearing cmos using jrst2001 but no luck . am i missing something ? aren't these method supposed to clear cmos ? i am really confused , my laptop is useless , can someone provide me a solution

    -is the password stored on some sort of eeprom flash permenant memory or what, aren't bios supposed to be resittable ?
     
  4. helmidragon

    helmidragon MDL Novice

    Dec 20, 2012
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    Update 2
    -i was trying to use flas**t.exe + vag70x64 but no luck , system wont boot into flash disk , actually it does not boot into anything
    -am in double lock , no access to bios , neither to boot devices
     
  5. redroad

    redroad MDL Guru

    Dec 2, 2011
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    #5 redroad, Jul 24, 2013
    Last edited: Jul 24, 2013
    Des the jumper look similar to this ?
    [​IMG]

    And are your choices something like this ?

    [​IMG]

    Edit : Is this it what you followed?

    Acer Aspire V3-771G Notebook Service Guide
    Page 76 Removing BIOS Passwords 0 To clear User or Supervisor passwords, open the Main door and remove the mylar from DIMM then use a metal instrument to short the RTCRST# point.(Figure 2-21 and Figure 2-22) Figure 2-21. CMOS Jumper Figure 2-22. CMOS Jumper r 2-20 System Utilities


    Acer Aspire V3-771G Notebook Service Guide
    Page 77 Cleaning BIOS Passwords 0 When customer forgets the BIOS supervisor/user password, he could clear the password as below: 1. Prepare a USB flash disk with FAT32 file system and copy ... button, to hold Ctrl and Alt key and then continually stroke Enter key until POST LOGO finish. 3. System will display "Press Y or y key to clear BIOS password.". 4. After press Y/y key, BIOS will clear BIOS password and reboot system. Figure 2-23. Clear BIOS Password The on screen message indicates the function success. NOTE: NOTE: This document is for Pegatron Acer project in 2012. System Utilities 2-21


    Acer Aspire V3-771G Notebook Service Guide
    Page 78 Using DMI Tools The DMI (Desktop Management Interface) Tool copies BIOS information to EEPROM. Used in the DMI pool for hardware management. 1. Execute < MN.bat > to update SMBIOS Type 1 Manufacturer Name(Figure 2-23). 0 Figure 2-24. Manufacture Name 2-22 System Utilities
     
  6. helmidragon

    helmidragon MDL Novice

    Dec 20, 2012
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    it's a laptop , jrst2001 and jrst2002 manualowl.com/m/Acer%20Computers/Aspire-V3-771G/Manual/288262?page=8 on page 76.i tried short circuiting them but no luck, password is always actif , i there a way to flash bios or downgrade it
     
  7. redroad

    redroad MDL Guru

    Dec 2, 2011
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    This has to work if you are making contact "short the RTCRST# point"

    From the picture in the manual I can't see the contact at all
     
  8. helmidragon

    helmidragon MDL Novice

    Dec 20, 2012
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    acerfans.ru/uploads/forum/images/1355659938.jpg it is similar to this one.
    i don't know why it's not clearing cmos and i keep getting the same promblems : bios still have password and system won't recognize booting devices.
    the problem of boot is related to updating bios
    BIOS - UEFI for Windows 8 (Not for Upgrades) 2.21 3.0 MB 2013/05/13

    -should i install windows 8 in a flash disk maybe to try to boot from it on system ?
    -can the bios be replaced to fix this problem , or maybe the system is using eeprom memory for password
    -i discharged the motherboard , and let it all night without power, and tried same thing
     

    Attached Files:

  9. redroad

    redroad MDL Guru

    Dec 2, 2011
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    When you are in th Bios --> Security Tab --> is the supervisor password enabled ? if not then it may not let you clear

    There may be parts of the following quote that nay help your current scenrio

    Source : http://community.acer.com/t5/Notebooks-Netbooks/Acer-Aspire-V3-771G-Windows-7/td-p/76795
     
  10. Pusser

    Pusser MDL Novice

    Aug 7, 2013
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    You are not alone. Same thing has happened to me with identical machine with the exception I never had a password set to begin with. i have been in IT over thirty years and now retired. I have never had one of my computers with any password in the cmos and yet it keeps asking for one. Press F2 quickly to enter a password I have never had.

    Certainly this problem was caused by the BIO Update and I too used the wrong bios update of the two offered.

    Acer wanted £50 to reset the cmos but I can do that myself so I thought. All power has been removed, cmos battery removed, + and - battery terminals shorted (No 3 pins and jumper that I could find) and still get asked for a password and still no bootable or any drives can be found.

    It is my view this has been caused by WIN8 embedding prod ID into BIOS but that is a guess, not a certainty,

    So my options are to buy a new mainboard and of course not forgetting to buy a fresh copy of WIN 8 or strip for spares and throw away.

    One positive note is that I shall remove win8 for all seven computers I own as I resent a software company interfering with my hardware which in my view is the same thing as the BBC deciding to place itself in the firmware of my telly.

    But any genius out there that has an idea other than phoning the Samaritans, I would indeed be grateful for the touch a human kindness.
     
  11. JonMT

    JonMT MDL Novice

    Mar 13, 2014
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    I have same issue. Has anyone found a way to correct this? I have tried all of the options here. Thanks to helmidragon for the picture to help me find those elusive jumpers. But no luck in that option either. I am tending to agree with Pusser as WIN8 seems to be very unfriendly to those who fix computers for a living. Please help if you can as a notebook would be better then a brick. Mainboard cost is about 190.00 Windows 8 another 120.00 new system is a better option economically.
     
  12. firecode95

    firecode95 MDL Novice

    Oct 24, 2013
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    well actually there isn't way to clear pasword with jumper because its stored in bios flash in dmi zone. The only way to reset pasword is to get special efi file that need to be put on usb flash, but there is one big problem I found that file on torrents but torrent is dead and probably acer won't give it so, if you are lucky and can found it Disablepassword.efi then share it there so others can use it.