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)
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.
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.