Question about Dell Dimension 3100 PC Desktop

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I need password for bios to dell dimension 3100 desktop?

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Dell does not supply bios passwords for Desktop systems. You would have to change the motherboard jumpers to clear the bios password. For help to clear the password please contact Dell Support for system ownership verification and they will then help you resolve clearing bios password.

Thank You,
Dell-Jesse L
Dell Social Media and Communities

Posted on Jan 10, 2013


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Posted on Jan 02, 2017

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SOURCE: Bios default password

The BIOS default password is just blank, and it is not asked.

When you set a bios password, you are asked to enter a value, therefore if bios is asking the password, the password had been changed.

To reset the bios password if you do not know the password you need to access to motherboard and temporarily remove battery for few seconds.
Removing battery will reset bios and delete the password.
Unplug power cord before accessing the motherboard, and try not touching the motherboard with your finger.
Put battery back in place before restarting computer.

See also the following websites:



Posted on Mar 04, 2009

  • 2427 Answers

SOURCE: Dell Dimension 2400 Lost Password for Bios

:0 easy

1.) remove the side panel
2.) locate the battery on the main board and remove it
3.) make sure the system is unplugged
4.) press the power button and hold for 10 seconds
5.) replace battery, plug in and power on.

Posted on Apr 03, 2009

SOURCE: Dell Dimension 2400 PC Desktop CPU Fan Suppose To Blow?

Blows air into the case away from the cpu.RICHARDM69...This is a solution please vote as such.

Posted on Dec 20, 2008

  • 447 Answers

SOURCE: Upgraded Dell Dimension 3100 memory to 2 Gigs - Windows XP fails

Did you add the two sticks with the 512 or remove the 512 and add the two 1gb sticks? Try booting the machine with ONLY the 1gb sticks in.

Your machine supports 1gb modules but they can't be higher than 533MHz. Check that the memory you purchased was either PC3200 (400MHz) or PC4200 (533MHz) and is 1.8v. If you post the part number off of one of the modules I can look it up for you.

Posted on Feb 22, 2009

  • 523 Answers

SOURCE: Cannot boot from USB on Dell Dimension 3100 even

you have to make sure that the usb has boot files. for example windows file.

Posted on Oct 06, 2009

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    Turn on your computer. If your computer is already on then reboot it. You need to see the initial display screen to get into the BIOS.

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