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How do you reset a Toshiba laptop BIOS password?

Posted By : Student of Katharine Gibbs School - New York on September 15, 2003

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I have a password on a Toshiba 4000cds laptop which is now forgotten and as a result can't booth my computer. The password is unfortunately laccated in the BIOS therefore does not allow me access to make any changes. However I have also done quite a few things to solve this problem but to no avail. I have tried removing cmos battery, short the system and much more. Please help.


This question was answered on September 15, 2003. Much of the information contained herein may have changed since posting.

The one and only way to bypass the Power On BIOS password

of a Toshiba Notebook This method works on all models

This is what you need:

1 Your notebook

2 An empty formatted diskette (720 kb or 1,44 mb)

3 A second computer (e.g a DOS desktop PC)

4 A hex-editor (e.g Norton DiskEdit or HexWorks)

This is what you have to do:

1 Start the desktop PC and start the hex-editor

2 Put the disk in drive A:

3 Change the first five bytes of sector 2 (boot sector is sector 1) to: 4B 45 59 00 00

4 Save it! Now you have a KEYDISK

5 Remove the disk from drive A:

6 Put the disk in the notebook drive

7 Start the notebook in Boot Mode (push the reset button)

8 Press Enter when asked for Password:

9 You will be asked to Set Password again Press Y and Enter.

10 You now see the BIOS configuration where you can set a new password.

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Posted by Student of Katharine Gibbs School - New York on September 15, 2003

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