Question about Dell OptiPlex GX520 PC Desktop
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
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Posted on Jan 02, 2017
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
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