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RESET BIOS Password for IBM ThinkPad T42

Naser Gabaj
Naser Gabaj asked
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Last Modified: 2013-11-17
Hi Guys,

I'm doing this for one of my best friends:

The shown above in the title of the Q, simply lost the BIOS Password how can i retrieve it, Is there a backdoor password, or resetting password using resetting jumpers, or batteries, as i used to do whenever a PC BIOS Password lost, I'm asking this because some experts told me IBM Make it very difficult to reset it to higher the security, but this seems to me ridicules, because what if i lost it, and i need to retrieve it like this case?

I've seen some links:

http://www.tech-faq.com/reset-bios-password.shtml
http://www.tech-faq.com/ibm-thinkpad-bios-password.shtml
http://ryxi.com/security/89-369-reset-root-password-read.shtml

But unfortunately nothing works.

Any help please...

Regards.

Naser
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Naser GabajE&P Senior Software Specialist
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Commented:
Thank you guys for the instant answers, but unfortunately nothing work :(

Callandor,

The link seems really interesting, but it's quit risky.

Any other thoughts please....?

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Commented:
I agree with the above, you won't be able to do it. Removing cmos battery won't help. The only way to remove a BIOS password on an IBM t42 or other new IBM laptops is either knowing the current password, or replacing the board, which will be almost as pricey as a new laptop... The passwords for these laptops are stored in a security chip which doesn't need power to keep the values. You might be able to change the chip if you can get a virgin chip and are good at soldering, otherwise you can forget it. Sorry.
Gary CaseRetired
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Commented:
The IBM Security-chip-enabled laptops are VERY secure.  This has been discussed in several previous questions, such as here:
https://www.experts-exchange.com/Hardware/Laptops_Notebooks/Q_21580563.html

Removing the CMOS battery will NOT help -- don't bother.

Bottom line:  There is no way to do this except to (a) have IBM replace the motherboard (requires proof of ownership);  (b)  replace the security chip (requires SMD soldering expertise, a new security chip, and recovery of the password from the old chip if the hard drive was also protected);  or (c) modification of the interface to the security chip so you can recover the information (that's what the modifications in Callandor's link allow you to do).

The least expensive -- if you have the expertise to do it -- is to do what's shown in the link Callandor provided.
Gary CaseRetired
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... I've got the address of a repair facility in Florida that will replace the security chip and restore the password for ~ $200 => but am not home (so don't have access to my notes) at the moment and won't be until the 28th.   If you need that, just ask, and I'll respond then.
Naser GabajE&P Senior Software Specialist
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Commented:
Thank you guys, although i did it by removing the battery and return it, and nothing works, till some one of my friends told me to leave it for a while 2-3 hours, till the whole circuit discharge the rest capacitors, it really do the job :)

Thanks guys.

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