No GPU fan after upgrading the BIOS to 4.2 on Satellite P100-434

Hi, I upgraded my BIOS today to version 4.2 and since the GPU fan only works during the splash screen, and once Vista has loaded, it never runs again, in addition, the CPU fan turns at a constant speed, and the screen has "shifted" to the right, so I quarter of the right hand of the screen on the left.
As you can imagine, it's a little annoying, and to say that the GPU temp is 65deg. with 90deg all about processors. not too good for the material.

Is could someone PLEASE tell me how I can downgrade the BIOS?

I have fans and fences etc. are all and free from dust.

I do turn all the appropriate toshiba of specific drivers, and I even tried to reinstall the NVidia one card.

GeForceGo N-Vidia 7600

Thanks in advance.


Someone else here had the same problem, according to the P100 support newsletters found here you must update the nVidia Driver If you update BIOS v4.2

Here is what says the newsletter:

Update the BIOS of the computer to the version 4.20 or newer:

1. click on the following link to download the BIOS version 4.20 for Satellite P100. Save the file on the Windows desktop.

You can also search for a newer version of this BIOS on Service and assistance from Toshiba site at

2. double-click on the file sp100v420.exe on the Windows desktop to start the driver installation.

3. restart the computer.

Update the display of the computer to version or newer nVidia Driver:

1. click on the following link to download the version of the nVidia display driver. Save the file on the Windows desktop.

You can also search for a newer version of this driver on Service and assistance from Toshiba site at

2. double-click on the file driver_display_nvidia_os2007387a.exe on the Windows desktop to start the driver installation.

3. restart the computer.

Tags: Toshiba

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