How to reset HP 4420s/4410s BIOS password

dennisdominic
dennisdominic used Ask the Experts™
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I have two laptop with BIOS Admin password protected and i forget the password.
I tried to took the batteries(included RTC) but it does not work at all.
Could anyone tell me how to reset the CMOS/BIOS password thanks
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There are issues with the BIOS on some of these models that causes a problem with resetting the BIOS password. I would suggest upgrading the BIOS first and then remove both the CMOS and main batteries.

Author

Commented:
it asked for password when i do the BIOS Upgrade~~~
Check with HP... ou can get their online supplrt here http://h50203.www5.hp.com/hpisweb/customer/HPInstantsupport.aspx?&cc=uk&lang=en

They are generally pretty good and you shoudl get a quick response.
Principal Software Engineer
Commented:
This topic comes up repeatedly, and here's a summary of the usual answers:

1.  Removing the BIOS backup battery seldom works on modern laptops.  Several years back, manufacturers realized security defeatable that easily is not security.  BIOS passwords are now stored on mini-flash chips, separate from the BIOS settings.  There are some individual exceptions.

2.  If you can prove to the manufacturer that you are the registered owner of the laptop, they can sometimes help you by issuing an override password.

Dell:
  Must prove ownership.  800-624-9896.  $50 for out-of-warranty.
  Ownership transfer: http://support.dell.com/support/topics/global.aspx/support/change_order/tag_transfer
  Warranty check: http://support.dell.com/support/topics/global.aspx/support/my_systems_info/details

HP/Compaq:
  "Password reset team" for some models.  HP phone support denies this.  Faxable request form (7 years old): http://forums11.itrc.hp.com/service/forums/getattachment.do?attachmentId=49108&ext=.pdf.  Voice number dead, FAX number active 10/2009.  $70 charge.
  HP service centers and some HP authorized techs have reset software for some models.  HP also denies this.

Toshiba:
  See this first:  http://web1.toshiba.ca/support/TechSupport/TSBs/ALL/-TSB000593.htm
  "Only an Authorized Service Provider can clear a Password if it has been forgotten. You will be required to show proof of ownership to the ASP prior to having the Password removed this way."

3.  If you can't prove that you own the laptop, some businesses claim to be able to override passwords for some models.  This is a very gray area as regards discussion here.  Google for information.

4.  If a password override is not available for your model, the password chip can sometimes be replaced.  If you have SMT desoldering and resoldering equipment, the chips are available on the Internet.  If not, the laptop can be shipped to a business that does replacement.  Google for information.  Expect this to be expensive.

Author

Commented:
informative.

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