This is no request thread! HP COMPAQ bioses, how to modify the bios?

Discussion in 'BIOS Mods' started by Yen, Aug 6, 2009.

  1. TTAV134

    TTAV134 MDL Expert

    Mar 1, 2009
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  2. nando4

    nando4 MDL Junior Member

    Jun 28, 2009
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    #1463 nando4, Mar 22, 2011
    Last edited by a moderator: Apr 20, 2017
  3. jlag

    jlag MDL Novice

    Mar 23, 2011
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    Is it any HP Probook 6550b BIOS to remove the WWAN Whitelist. I have an un2400 WWAN Card but my computer always gives me an 105 error with this card. Can any one help me?

    Thanks
     
  4. TTAV134

    TTAV134 MDL Expert

    Mar 1, 2009
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    sorry, any attempt to modify this bios brick the laptop.
     
  5. jlag

    jlag MDL Novice

    Mar 23, 2011
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    Thanks for the quick reply.
     
  6. Interceptor

    Interceptor MDL Novice

    Aug 5, 2009
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    I have Compaq 8710w Mobile Workstation. So I updated official BIOS version F.0F 25-nov-2008 by modded from this thread. After this I lost fingerprint sensor. There is no more such option in BIOS. I can't enable or disable it. And fingerprint sensor no more displayed in control panel. Any suggestions?
     
  7. Interceptor

    Interceptor MDL Novice

    Aug 5, 2009
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    This is the original (not modified) results of BiosConfigUtility /GetConfig:bios.txt
    as your see, FingerPrint device enabled. But it not exist in control panel anymore. And now there is no such option in BIOS.
    Now I see next options under Builting devices in BIOS:

    That's all. No fingerprint.

    But anyway. I was tried to apply this (not modified settings) by biosconfigutility /setconfig:bios.txt. Rebooted and no changes. Problem still occure.
    I was tried flash official sp41953.exe. Rebooted. Problem still occure.
    After this I flashed sp41953_SLIC21_SLPon_no_whitelist.zip and still view same problem. :-(

    I flashed under Windows 7 SP1 x64 OS, if it important.
     
  8. TTAV134

    TTAV134 MDL Expert

    Mar 1, 2009
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    sorry I'm stuck, except if you've open the laptop and unplug the fingerprint sensor cable i don't see any reason for this issue.
     
  9. Relay

    Relay MDL Novice

    Jan 11, 2011
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    This is true. :)

    When I first noticed the differences while debugging my code I thought this was a bug. I have spent some time studying them with a calculator and a piece of paper, and noticed that it was actually intended behavior. As it turned out there are two factors that influence the outcome of the packer.

    The first is that HP BIOS data sections do not seem to use maximum compression. I am unsure why this is the case, perhaps it is a mere tradeoff for better compression speed for the old days. Regardless, my compression code uses maximum possible window size, which means the algorithm searches all 4096 bytes for a best match (feel free to tweak this parameter, if need arises). For this reason the size of compressed data should be equal to or slightly smaller than the size of original compressed BIOS sections.

    The second factor is that this packer will search for a "history" match in reverse order as opposed to the HP packer. When it finds two or more possible candidates it selects the last one and ignores the rest... or was it the first one? I don't know, I forgot. Anyhow, the resulting compressed file will have a number of seemingly random binary differences when compared to the original BIOS section.

    While these differences should in theory result in identical data after decompression, I am unable to answer whether either will pose any problems for the actual BIOS unpacker. I assumed the code will handle it just fine, but that's the reason I published the code for testing.

    See ya!
    ~Relay
     
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  10. sebus

    sebus MDL Guru

    Jul 23, 2008
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    That is all you need

    sebus
     
  11. sebus

    sebus MDL Guru

    Jul 23, 2008
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    It does not brick it per se, as the new Probooks are designed to simply revert to good BIOS automatically (instant recovery)

    sebus
     
  12. wee

    wee MDL Novice

    Mar 31, 2011
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    There seems to be some testing done with bios for nc4200/tc4200 but no report of success or failure.

    I'm willing to test no whitelist BIOS for HP NC4200
     
  13. wee

    wee MDL Novice

    Mar 31, 2011
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    Downloaded, but not tried yet. Will follow up.
     
  14. goldmoon

    goldmoon MDL Novice

    Mar 31, 2011
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    Nx9420, NW9440

    Hi,

    Anybody can reupload the modded BIOS for these models? The upload link is not available:(

    THX
     
  15. wee

    wee MDL Novice

    Mar 31, 2011
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    I can happily confirm that this BIOS works for NC4200. Typing from it right now with a SparkLAN WMIA-198N mini PCI card.

    @TTAV134 Many thanks. What kind of charity do you endorse? So I can chip in an contribution.