Question about Dell OptiPlex GX520 PC Desktop

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How to reset my Dell OptiPlex GX520 PC Desktop Bios password

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If you can open the cabinet and there on the mother board you will find a CMOS battery (round one) take that battery and keep it out for around 3 mins and then put it back properly - start your computer - BIOS password will be reset .

Posted on Oct 04, 2010

  • 4 more comments 
  • Eddie Chen Jan 13, 2011

    Actually, open it up. there should be a small green taab somewhere on the motherboard. pull that out and turn it on. It will say password disabled. Turn it off, put it back in. turn your computer back on, go into system setup, and set up a new BIOS password if desired. You're welcome. :P

  • icedsweetros Jun 16, 2011

    Thank you so much, it worked! :)

  • kamis Dec 08, 2012

    Thanks for your help it woked...

  • mika Mar 05, 2013

    why my pc does not work?

  • mika Mar 05, 2013

    i'm used that way on my pc..but it's doesn't work?

  • siam lemmerz
    siam lemmerz May 19, 2014

    Unplug power?

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ginko
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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:

technibble.com/..
satyathakur.com/blog/

3fd1865.jpg

917b30f.jpg

Posted on Mar 04, 2009

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Hi,

The BIOS password may be cleared from a Dell Optiplex by removing the password jumper (PSWD) from the motherboard.
Can click the link below to see how its done or follow the steps below :--
http://support.dell.com/support/systemsinfo/documentation.aspx?c=us&l=en&s=gen&~subcat=87&~cat=12

Choose the desktop model and continue.

For most Dell Optiplex desktops, the steps to reset a BIOS password and clear all CMOS settings are:
  • Locate the 3-pin CMOS password reset jumper on the system board.
  • Remove the jumper plug from pins 1 and 2.
  • Place the jumper plug on pins 2 and 3 and wait approximately 5 seconds.
  • Replace the jumper plug on pins 1 and 2.
Else can follow Optiplex User Guides.

Hope it helps !!
Thanks.

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2 Answers

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:

technibble.com/..
satyathakur.com/blog/

3fd1865.jpg

917b30f.jpg

Mar 04, 2009 | Dell OptiPlex GX520 PC Desktop

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