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Old 24. Jul 2014, 08:18 PM   #1 (permalink)
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Default Lenovo g570 laptop; bios password problem

Simply put, my laptop defaults to password for booting up, before user password screen will come up. But the power on or boot password (which I am 100% sure I know) will not take because it has been disabled in the bios menu. So I am confused as to why it even comes up.

I have talked to Lenovo and some computer wise friends already, and researched on-line sites. Apparently there is no jumper/dipswitch in my Lenovo G570 laptop. I have had numerous suggestions, but I am not sure which to attempt first. As it stands now my computer is a peice of junk, useless, but if there is a way or step by step process to correct it that has been done on this model then great. I do not want to do something in despiration (I have some last resort ideas) to cause a total loss of use, or make it a cheaper route to just by a new computer.

Nothing crashed, nothing damaged. I have had it apart on looked internally for a bios battery or jumper switch. Some suggest removing bios battery for 15 mins and reinstall it for bios to reset? Some suggest a new mother board? Some suggest a recovery disc set-up from Lenovo. Lenovo will not gaurentee or inform me of specifically what they can do to fix the problem, when I know and tell them EXACTLY what the problem is and how it was caused. THANKS.
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Old 30. Jul 2014, 07:37 AM   #2 (permalink)
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Make sure the a/c cord is removed. Remove the primary battery. Remove the bios battery if possible (some are hard soldered in). Let set for an hour, re-install the bios battery, install main battery, power on, see what happens. The bios should reset assuming all power has drained from the computer.
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Old 03. Sep 2014, 12:31 AM   #3 (permalink)
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Thank you, joeguru. As mentioned I have searched for the bios battery numerous times, I have been led to believe it is hard soldered in. I have yet to locate it. I have searched the internet in an attempt to find its physical placement in my Lenovo G570 and have found no such info. [???????]. Would you have any idea (assuming it is hard soldered) of its dimensions, shape, color, or any info at all? Thanks again.
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Old 03. Sep 2014, 04:43 AM   #4 (permalink)
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There is a blog that has a photo of the battery but it has a blocked word in the URL so I can't link to it from this site. VirusTotal scanned the page as OK so have a read of it.

The poster explains that removing the CMOS battery makes no difference. He suspects that there are three sets of contact pads for shorting each of the three CMOS passwords. He didn't actually try it because he broke the power connector on the motherboard.

You need to replace FFFF with the bad 4 letter word that begins with F:
http://suker-punch.blogspot.co.nz/20...70-laptop.html

The http[ COLON ]//download [ DOT ] lenovo [ DOT ] com/consumer/mobiles_pub/Lenovo%20G470G475G570G575%20Hardware%20Mainenance% 20Manual.pdf"

G570 hardware manual was no help.
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Last edited by Anupam; 03. Sep 2014 at 03:59 PM. Reason: Obfuscated link to direct download of file
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Old 08. Sep 2014, 12:58 AM   #5 (permalink)
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From the service manual;
As many as two passwords may be needed for any Lenovo computer: the
power-on password (POP) and the supervisor password (SVP).
If any of these passwords has been set, a prompt for it appears on the screen
whenever the computer is turned on. The computer does not start until the
password is entered.
Exception: If only an SVP is installed, the password prompt does not appear
when the operating system is booted.
Power-on password
A power-on password (POP) protects the system from being powered on by
an unauthorized person. The password must be entered before an operating
system can be booted.
Supervisor password
A supervisor password (SVP) protects the system information stored in the
BIOS Setup Utility. The user must enter the SVP in order to get access to the
BIOS Setup Utility and change the system configuration.
Attention: If the SVP has been forgotten and cannot be made available to the servicer, there is no service procedure to reset the password. The system
board must be replaced for a scheduled fee.
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