Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win


How do I reset the supervisor password on the BIOS of a Toshiba M30?

Posted on 2004-08-13
Medium Priority
Last Modified: 2012-06-22
I've just inherited a Toshiba M30 from my company and discovered that the previous user had set a supervisor
password on the BIOS of the laptop.  Since the former user is no longer with the company, I have to reset the
password so that I can access BIOS and begin rebuilding the machine.

The BIOS is a Phoenix BIOS and I have already tried using various backdoor supervisor passwords
(phoenix, toshi99, etc.) but none have worked.  I have also disconnected the battery to the CMOS and left it
disconnected for over an hour, but the BIOS is still password protected.  I have tried looking for a clear
password dipswitch on the motherboard but have not been able to find one.  Are there any other possible
solutions I can try or can anyone direct me to resources that could help?

Any help would be greatly appreciated.

Some additional notes:

The laptop does not have a disk drive, nor can the boot options be changed from HDD boot up without going
through the supervisor password protected BIOS
Question by:dcr25568
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
  • 2
  • +2
LVL 12

Expert Comment

by:Gary Dewrell
ID: 11798274
Hi dcr25568,

Most Toshiba laptops and some desktop systems will bypass the BIOS password if the left shift key is held down during boot

God Bless
LVL 10

Expert Comment

ID: 11798326
you could probably also remove the cmos battery for a bit to clear the system password (provided you are into tearing apart the laptop and the battery is not soldered to the motherboard.  Had that work on a compaq just 3 days ago.

Author Comment

ID: 11798341
The problem does not affect OS bootup, but unfortunately the former user seems to have been a bit
disgruntled and sort of handicapped the machine by uninstalling some processes...

The BIOS password problem only affects any changes made to BIOS.  Essentially, I'm locked out of any
BIOS settings until I can provide the correct supervisor password or can reset the password.

Removing the CMOS battery for more than an hour did not do anything, unfortunately.  I went back into
BIOS and was still locked out of the settings.
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

LVL 12

Expert Comment

by:Gary Dewrell
ID: 11798347

I have had to take extreme messures before. You could download the latest bios firmware and flash the bios. This usually will remove any passwords and resets the bios to defaults.

God Bless


Author Comment

ID: 11798446
There is a slight problem with flashing the BIOS with new firmware.  Since I am locked out of BIOS
I cannot change the boot preferences to boot straight to the harddrive.  Therefore, I cannot
boot a floppy that would load up the new firmware for the BIOS.

Pressing F12 will not allow me to change the boot preferences either upon computer start.
LVL 12

Expert Comment

by:Gary Dewrell
ID: 11798475

OK, try this. Some bios Mfg's put in backdoor passwords. These are some common Phoenix backdoor passwords.

phoenix   PHOENIX   CMOS   BIOS

These are case sensitive.

Good luck.

Author Comment

ID: 11800407

I just tried those passwords out just now and I am still receiving "password invalid"...
LVL 12

Accepted Solution

Gary Dewrell earned 1500 total points
ID: 11801078
I'm rapidly running out of ideas here :)
I would at this point contact Toshiba and see if they can help. Their may be a bios reset switch on the motherboard that you could use to reset the bios to defaults.

Sorry i was not of more help.

God Bless


Expert Comment

ID: 13950168
Most Toshiba laptops can be convinced to boot without their power-on BIOS password by attaching a dongle to the serial port which crosses a number of the pins. just connect the pins together: password can then be changed in toshiba console in windows (only tested windows xp)


Some Toshiba's can be convinced to bypass the startup BIOS password if you hold down the <LEFT-SHIFT> key while booting the system.


Expert Comment

ID: 13950178
I found that pins solution online and i whould give you a link to the website but I don't remember where it is ... but i used a d09m to rj45 converter and removed the rj45 part and crossed the pins like they talked about. amazingly this did the trick.

Expert Comment

by:David McNeill
ID: 22727059
The jumpered parallel pin solution above only works on ancient models.

Older models need a USB key

Neither method works on newer models.


for full details.

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I am not new to IT, I have been working in the field since 1985.  But recently I came up against something that stumped even me (it doesn't happen as often as I would like).  I was running a screencasting session from the laptop to my TV via ChromeC…
In this article you will get to know about pros and cons of storage drives HDD, SSD and SSHD.
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

604 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question