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Toshiba Satellite 4000CDS BIOS password backdoor

Discussion in 'Retro & Arcade' started by Sir Didymus, Mar 3, 2020.

  1. Sir Didymus

    Sir Didymus Member

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    Hi guys,

    I'm trying to help a friend with an old Toshiba Satellite 4000CDS with a BIOS password.

    Apparently the only way to remove it is to make a parallel port loop back dongle

    https://criggie.org.nz/laptop/tecra530cdt/toshibapassword.shtml

    Before I go hunting for a printer cable just putting it out there in the off chance someone has one already that I could buy or borrow.

    Cheers
     
  2. HyRax1

    HyRax1 ¡Viva la Resolutión!

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    Have you tried disconnecting the battery (including any clock battery on the motherboard) and leave it off for a few days? That's what I already do for modern PC's - can't imagine it's very different for an older machine.
     
  3. OP
    OP
    Sir Didymus

    Sir Didymus Member

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    This was my initial instinct but the cmos battery doesn't seem to be readily accessible and I didn't want to start tearing down this antique.
    I might poke around a bit more though.
     
  4. ShadowBurger

    ShadowBurger Member

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  5. greencamel65

    greencamel65 Member

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    having worked as a toshiba repair tech i can vouch that removing the battery will not work on a lot of systems.

    Your lucky that the device you have allows the parallel port method, some other models generate a challenge code, and only Toshiba can issue the response code.

    Other models also have small pads under the ram that you can short out.
     
  6. Pierre32

    Pierre32 Member

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    Even if there are easier methods, part of me would still want to build that dongle. What a cool piece of hacker kit (that you would probably use once in your life... but still.)

    Not sure I have much in the way of spare parallel cables, but will check tonight.
     
  7. greencamel65

    greencamel65 Member

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    yoink likes this.
  8. OP
    OP
    Sir Didymus

    Sir Didymus Member

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  9. OP
    OP
    Sir Didymus

    Sir Didymus Member

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  10. elvis

    elvis Old school old fool

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  11. ShadowBurger

    ShadowBurger Member

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    damn need to find some of those for various USB types
     
  12. elvis

    elvis Old school old fool

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    slavewone and Pierre32 like this.
  13. Pierre32

    Pierre32 Member

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    Ok elvis, you've spurred me on to dust off my account. You should be using referral links :D
     
    elvis likes this.
  14. slavewone

    slavewone Member

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    I literally have a USB to alligator plug coming in the mail.

    It’s converting a camping lantern from 6v lead acid to a USB battery.
     
  15. breech

    breech Member

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  16. OP
    OP
    Sir Didymus

    Sir Didymus Member

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    I should have mentioned it's not just a BIOS access password, the system wont' actually boot up without a password.
    Thanks for everyone's input but I've lined up parallel port dongle to borrow. I'll let you know how it goes.
     
  17. OP
    OP
    Sir Didymus

    Sir Didymus Member

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    Pierre32 likes this.
  18. Hater

    Hater Member

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    can;t you just cut up an old parralell cable and twist 'n tape?
     
  19. OP
    OP
    Sir Didymus

    Sir Didymus Member

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    I tried that with the one cable I had lying around but the plug was molded in one piece and after hacking into it the pins and wires were embedded in plastic.
    For the sake of $11 I'll take the easy way.
     
  20. Pierre32

    Pierre32 Member

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    Plus it's a cool thing that you could do other cool things with.
     

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