Reset bios password elitebook 2740 - HEWLETT-PACKARD Hewlett Packard 2740P ELITEBOOK I5540M 253G4GB 160GB 121WXGA W7P WS272AWABA PC Desktop

There are no master password generators for ProBooks or EliteBooks.
You will need to contact HP.
http://www8.hp.com/us/en/contact-hp/ww-contact-us.html?jumpid=reg_r1002_usen_c-001_title_r0003
Or look at this link.
http://forums.mydigitallife.info/threads/49497-HP-Probook-Elitebook-BIOS-Password-Reset-Utility
Or replace the BIOS chip.
http://www.ebay.com/itm/HP-Probook-4310s-4410s-4510s-4710s-6440b-6445b-6540b-6545b-Bios-Chip-No-Pass...

Generally, there are two ways to reset forgotten HP BIOS password. One is forcing BIOS/CMOS to reset itself to its stored defaults by removing all power to it. The other is to use a program to either locate or identify the password and reveal it to you or erasing the password entirely.
And the most easiest and convenient method for erasing dynamic BIOS/CMOS settings is to remove battery directly from the motherboard. It applies to most motherboards besides HP Elitebook BIOS. At this moment, HP Elitebook based on UEFI Bios provides a tool to reset BIOS password specially - HP SpareKey.
How to reset BIOS password with SpareKey?
1. Before forgot BIOS password, you have set answers to three predetermined personal identification questions.
Write down the answers to these questions and put them in a safe place, away from the computer, so that you can always access them.
2. When you cannot remember the password to access the BIOS on your computer, turn on the computer and immediately press the ESC key to display the Startup Menu. And then press the F7 key.
3. HP SpareKey wizard pops up and prompts you for the answers to the three personal identification questions. If you successfully answer the questions, you are granted access and you can reset the password.
If you do not answer the questions correctly in the three attempts, you will be locked out of your computer. And then you must contact HP for assistance.

Note: HP SpareKey cannot help you recover a Windows 7 or Vista administrator account password. It is intended solely to recover system-level passwords.
http://www.isunshare.com/windows-7-password/reset-hp-elitebook-password.html

You might try this, although it might not work on your specific model as some Elitebooks keep the password even if these steps are followed. Try this link

http://h30434.www3.hp.com/t5/Notebook-Display-and-Video/Reset-BIOS-Password-EliteBook-8540w/td-p/927153

i removed the battery and waited for 3 mins. it says its been resetted to default but still ask for password. is there a default password?? for elitebook 8440p i7

read tutorial on how to reset BIOS password: http://www.windowspasswordsrecovery.com/articles/computer/how-to-reset-bios-password.html

Everything I am reading on this indicates you have to conmtact HP for the hardware password, otherwise that motherboard will irrevocably locked. There dosen't seem to be a shorting out method to reset the bios to factory defaults

To reset the BIOS password read the information from this link.

In case of your HP Elitebook laptop the easiest method would be using software from Hiren's Boot CD as it's pretty hard to open it up and reach for the CMOS battery or the jumper and I wouldn't recommend doing it especially if it's under warranty.

Generally, there are two ways to reset forgotten BIOS password. One is forcing BIOS/CMOS to reset itself to its stored defaults by removing all power to it. The other is to use a program to either locate or identify the password and reveal it to you or erasing the password entirely.
HP Elitebook based on UEFI Bios provides a tool to reset BIOS password specially - HP SpareKey.

Generally, there are two ways to reset forgotten HP BIOS password. One is forcing BIOS/CMOS to reset itself to its stored defaults by removing all power to it. The other is to use a program to either locate or identify the password and reveal it to you or erasing the password entirely.
And the most easiest and convenient method for erasing dynamic BIOS/CMOS settings is to remove battery directly from the motherboard. It applies to most motherboards besides HP Elitebook BIOS. At this moment, HP Elitebook based on UEFI Bios provides a tool to reset BIOS password specially - HP SpareKey.

How to reset BIOS password with SpareKey?
1. Before forgot BIOS password, you have set answers to three predetermined personal identification questions.
Write down the answers to these questions and put them in a safe place, away from the computer, so that you can always access them.

2. When you cannot remember the password to access the BIOS on your computer, turn on the computer and immediately press the ESC key to display the Startup Menu. And then press the F7 key.

3. HP SpareKey wizard pops up and prompts you for the answers to the three personal identification questions. If you successfully answer the questions, you are granted access and you can reset the password.
If you do not answer the questions correctly in the three attempts, you will be locked out of your computer. And then you must contact HP for assistance.

Note: HP SpareKey cannot help you recover a Windows 7 or Vista administrator account password. It is intended solely to recover system-level passwords.
http://www.isunshare.com/windows-7-password/reset-hp-elitebook-password.html

Pull the battery, cmos battery, and power cord for 10-20 minutes