Laptop sets it own bios password after flash reset

Hi Guys,

I have been a fan for many years just never needed to post,
I am a computer guy in London trying to solve a mystery.

Last week a Japanese lady left a laptop with a simple problem:
Every time it was shut-down it would restart.
No matter how you initiated shut-down (button or start menu).
So the first thing I did was use a live cd (slax) to shut-down.
I had the same problem. The computer just restarted.
This ruled out viruses and so i upgraded the bios.

Unbelievably the problem persisted so I took the final step of
resetting the CMOS/BIOS by shorting the cmos battery.

Now the problem is solved, the unit will shut down BUT now I have been
presented with a password where there was none before!
The computer is locked with a factory bios password.
I have asked the owner but she has never set up the password.
She called tech support in Japan but they say there should be none!!


Toshiba Dynabook cx/875ls bios version 1.80 (Satellite M100)

I just found this on ebay:

http://cgi.ebay.com/Toshiba-Satellite-How-to-remove-BIOS-password-by-itself_W0QQitemZ300263014098QQcmdZViewItem?_trksid=p3286.m20.l1116

The laptops look almost identical.


Any idea where I can find out what it is? or what else to try? I am
presented with a password screen as soon as the computer is switched
on.
3 answers Last reply
More about laptop sets bios password flash reset
  1. Well, passwords are stored in the CMOS, so you can reset that again.

    What do you mean, short the battery? I've never heard of that method of clearing a CMOS, and, generally, shorting things out is undesirable.

    You can always take the battery out and let the caps drain - clear the CMOS the slow way.

    Perhaps try updating again, rewrite everything? Are you sure that BIOS file you got wasn't tampered with?
  2. Hi
    Thanks for your reply

    Well I share your thoughts on this:

    Quote:
    Well, passwords are stored in the CMOS, so you can reset that again.


    But this is not the case as I have disconnected the battery for 12 hours.

    Quote:
    What do you mean, short the battery? I've never heard of that method of clearing a CMOS, and, generally, shorting things out is undesirable.


    I connected both terminals on the battery this is relatively harmless when done for a short time. It just removes the potential difference to the chip. (Same as a dead battery)
    I did not want to use my soldering iron (which I ended up doing).

    I cannot update anything as the first thing I see after splash screen is a password request.

    There is a guy on ebay who seems pretty sure of himself when it come to fixing this. Please see his response to my other post:
    http://www.wimsbios.com/phpBB2/topic10548.html#50670
  3. I don't know about that...it's some random post, the guy has no history in the forum - ebay is a seller's site, not a repairman's site. I'll do some more searching when I get back to my hall.
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