Question about Dell Latitude C640 Notebook

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How do you remove the system lock password set in CMOS

How do you remove the system password.?

After a year I can't remember the system password I put on my laptop and I need to remove it or reset it so I can get into it.

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You have to do a full restore to your computer to get in. Hold down the the F8 key or F10 key and they should put your computer into a recovery mode.

Posted on Dec 03, 2008

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Why do I keep getting a pop up asking for my password over and over again on a black screen?


If this occurs on a Window-based PC prior to seeing the Windows Start screen, it most likely means that someone has entered a System Password into the CMOS/BIOS that requires entry before the system will boot. If your CMOS/BIOS was not password-protected anyone who had access to the machine would be able to enter the CMOS and set up such a password, effectively locking you out. Of course, it they did not put a password on the CMOS itself, you may be able to enter the CMOS yourself and remove the password, as long as you do not have to know it to remove it. If you MUST know the password, you may have to do a CMOS reset to release the password. Ensure that if you do that, you know all settings in the CMOS that need to be modified from default or you may have operational issues later. If there is a CMOS password on the system as well, and you did not place it there, someone is messing with your head.

Sep 28, 2015 | Acer Computers & Internet

1 Answer

Password for bios


It depends where the machine came from. It may have been put on by the shop that sold it, or a previous owner.

Sadly, I cannot find an online manual for this motherboard (it should be a MCP61PM-GM motherboard), which would lead to how to reset the BIOS. Have a look around the motherboad closely, and see if you can find a switch, or even remove the power and the battery for at least 24 hours.

This is some info I found that may help you:
"Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop.
Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.
Removing the CMOS Battery The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time.
Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system."

Jul 31, 2011 | eMachines ET1161-05 PC Desktop

1 Answer

I cannot remember the password I set for my Acer Aspire 1 D250 netbook computer. Will removing the CMOS battery reset the password?


cmos bateryy resets just the ios passwords. For windows , press f5 uittill the system is booting, enter in safe mode, go to control panel, accounts and set a new password for your account

Mar 24, 2011 | ASUS Eee PC 1005HA-PU1X-BK Netbook

2 Answers

I need a pasword.when i enter the bois there need a pasword.so help me how 2 break the pasword


Hi Good day!! turn off your PC Remove your CMOS battery (2032 3volts) within 1minute and then put it back, turn on your PC now your bios password should be remove.

Oct 19, 2010 | MSI Microstar KT6 Delta (MS-6590)...

1 Answer

Removing bios password of toshiba portege 4010


HOPE THIS HELPS...BE SURE AND READ ALL BEFORE STARTING...GOOD LUCK

WARNING: Some BIOS configurations will lock you out of the system completely if you type in an incorrect password more than 3 times. Read your manufacturers documentation for the BIOS setting before you begin typing in passwords.
Award BIOS backdoor passwords:ALFAROME BIOSTAR KDD ZAAADA
ALLy CONCAT Lkwpeter ZBAAACA
aLLy CONDO LKWPETER ZJAAADC
aLLY Condo PINT 01322222
ALLY d8on pint 589589
aPAf djonet SER 589721
_award HLT SKY_FOX 595595
AWARD_SW J64 SYXZ 598598
AWARD?SW J256 syxz
AWARD SW J262 shift + syxz
AWARD PW j332 TTPTHA
AWKWARD j322
awkward

AMI BIOS Backdoor Passwords:AMI BIOS PASSWORD HEWITT RAND
AMI?SW AMI_SW LKWPETER CONDO

Phoenix BIOS Backdoor Passwords:phoenix PHOENIX CMOS BIOS

Misc. Common PasswordsALFAROME BIOSTAR biostar biosstar
CMOS cmos LKWPETER lkwpeter
setup SETUP Syxz Wodj

Other BIOS Passwords by ManufacturerManufacturer Password

VOBIS & IBM merlin
Dell Dell
Biostar Biostar
Compaq Compaq
Enox xo11nE
Epox central
Freetech Posterie
IWill iwill
Jetway spooml
Packard Bell bell9
QDI QDI
Siemens SKY_FOX
TMC BIGO
Toshiba Toshiba

Toshiba BIOS

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

Press both mouse buttons repeatedly during the boot
Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings

Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop.

Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.
Removing the CMOS Battery

The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time.

Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system.

Oct 16, 2010 | Toshiba Computers & Internet

2 Answers

How can i remov the hp compaq nx6310 laptop bois password


If you didn't set it or do not know it then the entire laptop will have to be dismantled to remove the cmos battery for one hour to cancel that password.There is no easier way.

Oct 16, 2010 | HP Compaq nx6310 Notebook

1 Answer

Trying to begin


Hi,

You have to clear the CMOS to clear all power on passwords.

With the computer facing you remove the power cord and then take of the left hand side panel of the tower to expose the motherboard.

Look near the bottom right of the motherboard for the BIOS battery. It looks like this >>>>>
5f5bde2.jpg

Remove this battery for about 20 minutes periodically hitting the on/off switch to dispel any residual power from the motherboard. This will clear the CMOS for you.
After 20 mins is up put the battery back in and put the side panel back on.
Turn on the computer and it should boot to the operating system.

Remember to set the year, date and time as these will be reset.


Regards.

Jul 09, 2010 | Dell Dimension 9100 PC Desktop

1 Answer

My computer shows a message like this on the start : "this computer system #7WQ6V3J-595B, is protected by a password authentication system, since i bought this laptop in a "used sale fair" i dont know...


Hello,

the computer has been locked from the bios settings.

What you need to do now is to access the Cmos battery on the laptop, remove the Cmos battery and turn on the laptop without the Cmos battery.

The Cmos battery is where the laptop memorizes the password and stores it. So when the Cmos battery is absent, the computer cannot remember any password

The Cmos battery is like a watch battery, but its bigger than a watch battery. You can find the Cmos battery when you loose the laptop from under. But you must first remove the laptop battery before you loose the laptop. You can open the link below to see what a Cmos battery looks like:

http://images.google.com/images?hl=en&q=Cmos%20battery&aql=&oq=&um=1&ie=UTF-8&sa=N&tab=wi

You can also check the below link for more information about the bios.

http://www.technibble.com/how-to-bypass-or-remove-a-bios-password/

Take care.


Mar 01, 2010 | Office Equipment & Supplies

8 Answers

Hp compaq 6910p BIOS Bypass


I removed the keyboard, unplugged the bios battery, holded down the power button about 30 secs, plugged back the bios battery, assembled the computer, didn't plug the battery and instead of that just plugged the ac adaptor and the bios passwd was gone =)

Oct 29, 2008 | HP Compaq Business Notebook 6910p - Core 2...

1 Answer

Can't get pass the blackscreen password


That is the BIOS password





Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings
Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop. Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.
Removing the CMOS Battery
The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time. Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system

Aug 15, 2008 | Computers & Internet

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