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What's DOS?
Posts: 2
Registered: ‎04-28-2016
Location: US
Message 1 of 3 (244 Views)

W550s BIOS and boot password bypass - battery drain?

Greetings!

 

I'm a sysadmin that had a former user turn in his W550s when he left your company.

 

There's a power on password set & a BIOS password set that I do not have. 

 

I've taken out the external battery, disconnected the internal battery, and unplugged the CMOS BIOS coin battery.

 

Will the eventual discharge of the caps allow the factory reset to occur without further action? Or is there a jumper hiding someplace that I'll need to bridge and boot briefly to clear?

 

Thanks Smiley Happy

 

Community Moderator
Posts: 6,417
Registered: ‎01-01-2010
Location: US
Message 2 of 3 (237 Views)

Re: W550s BIOS and boot password bypass - battery drain?

The BIOS password cannot be bypassed.  There is no backdoor password.  The "fix" is to replace the motherboard



I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

I am not an employee or agent of Lenovo.
What's DOS?
Posts: 2
Registered: ‎04-28-2016
Location: US
Message 3 of 3 (222 Views)

Re: W550s BIOS and boot password bypass - battery drain?

And yet I just let it sit unplugged for a couple of hours and ...viola, I'm in the BIOS with no passwords and resetting boot orders,  changing the settings, putting UEFI back where I want it, etc.

 

Methinks you should check the validity of your data, sir, as it seems to be a bit off, since I'm reimaging the machine as I type this.

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