[Solved] Dell Precision M4500 - BIOS update - Help

Discussion in 'BIOS Mods' started by james071, Jul 14, 2014.

  1. james071

    james071 MDL Novice

    Jul 6, 2014
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    Hello all,

    I bought Dell precision m4500 from craigslist and apparently the bios supervisor password is set and the laptop bios is locked. I installed windows 7 x64 and the laptop is working fine but if I run Ubuntu the system hangs and doesn't respond even with the newest drivers installed. The issue is, the laptop hangs from time to time and that's because of an outdated BIOS revision. The current bios is A05 and the latest is A15.

    I'm trying to update the bios from A05 to the latest to resolve the issues.

    I made some research and found some websites offering the backdoor password for free. i tired entering my service tag and the passwords generated didn't work. Below are the urls for the bios password recovery.

    http://laptoplabcalicut.com/laptopservicecalicut/bios/biospassword.html
    http://dogber1.blogspot.in/2009/05/table-of-reverse-engineered-bios.html
    http://bios-pw.org/

    Is there a workaround to update the bios without the use of password? or is there a way to remove the password?

    I found a utility to dump the bios. Not sure if this will help in recovering the bios password. Also, I was able to extract the hdr file the bios update. Idea please?

    Also, i found some utilities such as Hiren Boot dics etc.. to recover bios passwords. none worked.

    Dell Precision m4500
    System Number: C2ZQMN1-2A7B
    Service Tag: 26302349341

    Note: Special thanks to Tito for the extended help and support.

    Request your help in finding, recovering, cracking etc.. the bios password. Thanks in advance.
     
  2. pominator

    pominator MDL Novice

    Dec 12, 2008
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    You may be able to remove the laptop battery but you'll need to open the laptop for this. Not all laptop are made the same, some use traditional desktop motherboard battery, other you need to unsolder the battery wire, etc. Some you'll be able to access the battery only removing back cover, most you'll need to dig to the heart of the laptop.

    P-S. : Just found a video quickly on google. I can't post the link but google "How to replace the CMOS battery in the Dell Precision M4500 Laptop". Look pretty easy. Disconnect the battery 10 minutes, reconnect and you should be good to go.
     
  3. james071

    james071 MDL Novice

    Jul 6, 2014
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    yes, your right. i tried that before removing the cmos and laptop battery for a full day. no luck.
     
  4. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    if it boots maybe cmospwd in usb dos... remove hdd to boot usb.

    maybe force flash it by recovery method.. seems newer model so might not get the file with .exe /writehdrfile
    i think..
     
  5. james071

    james071 MDL Novice

    Jul 6, 2014
    28
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    right. first i tried extracting the hdr & rom files via cmd for example m4500a15.exe/ writehdrfile /writeromfile but it didn't work. then i found a python script and was able to extract the hdr file. i couldn't extract the rom though. so now i have the hdr file.

    fyi - i tried cmospwd recovery via usb and it didn't work.

    how do you recommend to force flash recovery method?
     
  6. tqhoang

    tqhoang MDL BIOS Modder

    Apr 29, 2008
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    #6 tqhoang, Jul 16, 2014
    Last edited: Jul 16, 2014
    Did you try all 3 Dell passwords?

    9p9j6628
    b7x5ap6i
    UZVr1d164PaoGk4B
     
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  7. james071

    james071 MDL Novice

    Jul 6, 2014
    28
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    yes i did. none worked.
     
  8. tqhoang

    tqhoang MDL BIOS Modder

    Apr 29, 2008
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    Do you have a QWERTY keyboard or some other layout?
    Also did you try pressing CTRL+ENTER after you typed in the case-sensitive code?
     
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  9. james071

    james071 MDL Novice

    Jul 6, 2014
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    i tried the recovery passwords directly from windows m4500A15.exe. i didn't try from the bios directly. I will try and let you know.

    fyi - the laptop keyboard is not working. i'm using external wired microsoft 600 keyboard. will this keyboard work? it is qwerty - right?
     
  10. tqhoang

    tqhoang MDL BIOS Modder

    Apr 29, 2008
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    Look at your keyboard at the letter Q and follow it to the right. If the keys spell QWERTY, then you have a QWERTY keyboard.

    I think I have heard of others using a USB keyboard when the built-in one is not working.
     
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  11. james071

    james071 MDL Novice

    Jul 6, 2014
    28
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    i tired the recovery passwords from bios with crtl + enter and nothing worked.

    yes, my keyboard is qwerty.
     
  12. james071

    james071 MDL Novice

    Jul 6, 2014
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    Hello All,

    Is it possible to get the latest dell bios utility cd? i found one but when i ran the utility it showed system not supported.

    The one i found is pcemporium.webs.com/Dell Bios Reset.iso

    Thanks.
     
  13. james071

    james071 MDL Novice

    Jul 6, 2014
    28
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    #13 james071, Jul 20, 2014
    Last edited: Jul 20, 2014
    (OP)
    I ran dell platform tags and i got the following.


    C:\dell\drivers\7738M\Ver 4.006>PlatformTags64.exe rpt

    PlatformTags.exe -- Version 4.006
    (C) Copyright 1993-2012 Dell Inc.

    Service Tag .... C2ZQMN1
    Asset Tag ...... <not set>
    Owner Tag ...... <not set>
    ePPID Value .... FGDMFGDMFGDMFGDMFGDMFGD

    SUCCESS - Application return code (0x00)

    also, when i ran the following, i got the below.

    C:\dell\drivers\7738M\Ver 4.006>PlatformTags64.exe

    PlatformTags.exe -- Version 4.006
    (C) Copyright 1993-2012 Dell Inc.

    PlatformTags.exe [File:<Name>] [Command]

    View/modify Platform Tags

    Usage:
    [File:<Name>] Specify a path\filename to echo screen text
    [Command] Specify a command to execute

    Commands:
    RPT (or ReadPlatformTags) Display All Tag information
    SAT (or SetAssetTag) Set the Asset tag
    DAT (or DeleteAssetTag) Delete the Asset Tag
    SOT (or SetOwnerTag) Set the Owner Tag
    DOT (or DeleteOwnerTag) Delete the Owner Tag

    Note: SAT and SOT must be followed by ':' and the string to be used in the tag
    field
    If spaces are required in the owner tag, use quotes to surround the data

    Return Codes:
    0xFF = Error Condition - Screen will show error
    0 = Success


    C:\dell\drivers\7738M\Ver 4.006>PlatformTags64.exe sat

    PlatformTags.exe -- Version 4.006
    (C) Copyright 1993-2012 Dell Inc.

    ERROR: The BIOS interface to write the tag failed

    BIOS EFI return code = (15)
    Application return code (0xFF)


    C:\dell\drivers\7738M\Ver 4.006>PlatformTags64.exe dat

    PlatformTags.exe -- Version 4.006
    (C) Copyright 1993-2012 Dell Inc.

    ERROR: The BIOS interface to write the tag failed

    BIOS EFI return code = (15)
    Application return code (0xFF)


    C:\dell\drivers\7738M\Ver 4.006>PlatformTags64.exe sot

    PlatformTags.exe -- Version 4.006
    (C) Copyright 1993-2012 Dell Inc.

    ERROR: The BIOS interface to write the tag failed

    BIOS EFI return code = (15)
    Application return code (0xFF)


    C:\dell\drivers\7738M\Ver 4.006>PlatformTags64.exe dot

    PlatformTags.exe -- Version 4.006
    (C) Copyright 1993-2012 Dell Inc.

    ERROR: The BIOS interface to write the tag failed

    BIOS EFI return code = (15)
    Application return code (0xFF)


    C:\dell\drivers\7738M\Ver 4.006>
     
  14. james071

    james071 MDL Novice

    Jul 6, 2014
    28
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    Hello all,

    Good news. I was able to fix the issue and i was able to remove the admin bios password. :D

    the issue was, the four last digits 2A7B were wrong - not sure why the system is reflecting the following but in reality different. i tried changing the four last digits and tested most of the following 595B/D35B/2A7B/A95B/595B/D35B/2A7B/A95B/1F5A/3A7B/3A5B/1D3B and 1F5A was the code.

    I used the following url bios-pw.org and was able to generate the recovery bios password.

    Thanks to everyone tried helping. Great forum and support. :rolleyes:
     
  15. james071

    james071 MDL Novice

    Jul 6, 2014
    28
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    I updated the bios to a15 (see below) and everything is running smooth - no hangs and no glitches. i'm running base Windows 7 x64 and using oracle virtualbox to run Ubuntu 14.04 and CentOS 7.

    System Manufacturer: Dell Inc.
    System Model: Precision M4500
    System Type: x64-based PC
    BIOS Version: Dell Inc. A15, 12/5/2013