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51 lines
2.1 KiB
Markdown
51 lines
2.1 KiB
Markdown
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---
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title: DELL Latitude series
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layout: default
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created: 2008-07-20 22:26:53 +0200
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updated: 2008-07-20 22:25:53 +0200
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toc: false
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tags:
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- know-how
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- hacking
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- hardware
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- bios
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- passwords
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- dell
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- latitude
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---
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These ones are something different. DELL notebooks save their BIOS password in an EEPROM-chip so it isn't deleted when
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you short-circuit the BIOS battery or something like that.
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Also there's no jumper/DIP-switch which disables the password. Nevertheless, there are three different ways to get such
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things fixed:
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1. Solder out the EEPROM and replace it with an empty one (this will result in service tag loss), or
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1. Generate an universal password for this device (only works for tags ending with `-D35B` for now), or
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1. Short pin 6 or 7 of the EEPROM to ground. See [General strategy]({% post_url 2009-10-30-bios-passwords %}#dell_notebooks) for more info.
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I will describe the second one here.
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Service tags ending with -D35B
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==============================
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Switch on the notebook until you get the password-entry screen, which should look like this one:
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Notice the service tag number **8WG030J-D35B** which is the key to the password. Now hack this number into the nice tool ([Latitude_MasterPW.exe]({{ site.url }}/assets/latitude.zip),
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there is another tool included for Latitude XPi) and generate your master password.
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Enter the service tag **EXACTLY** as it appears in the BIOS (all upper case letters) and get your master password
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("jgnijfyj" in this case).
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Now enter this master password on the password prompt (Remember that on German keyboards, z ⇔ y!), **hold down the
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<kbd>Ctrl</kbd>-key and press <kbd>Enter</kbd> twice**. Et voilà!
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I don't know why, but somehow, my service tag changed to **8WG030J-595B** (either it was because of this password
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breach or because of a BIOS upgrade). The generated universal password doesn't work with this new service tag.
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Also read the DELL-section under [General strategies]({% post_url 2009-10-30-bios-passwords %}#dell_notebooks).
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[Back to overview.]({% post_url 2009-10-30-bios-passwords %})
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