This information is intended for experienced users. It is not intended for basic users, hackers, or computer thieves. Please do not try any of following procedures if you are not familiar with computer hardware. I'll not be responsible for the use or misuse of this information, including personal injury, loss of data or hardware damage. So use it at your own risk.
A. By Using Software:
I have found that using Dogber1's Dell Password generator is a great solution to this problem. It is free and takes approximately 10 seconds to download from his site.
B. By Using the Motherboard Jumper:
In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
Make sure to turn the PC off before opening the cabinet and resetting the jumper.
Good luck
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Easiest way to clear your cmos is to remove the button batter and make sure the laptop doesnt have power. It will be on the main board. Make sure all is unplugged, main and cmos battery are out. Leave this way for 120 seconds. Cmos should clear.
Generic BIOS / CMOS passwords
Try using generic CMOS passwords. A complete listing of these passwords can be found on
document CH000451.
Use a BIOS password utility
There are utilities designed to help bypass CMOS
passwords. An example of a great utility to decrypt / bypass BIOS
passwords is the
PC BIOS Security and Maintenance toolkit, which is available by
clicking here.
Clear using jumper (recommended)
Precaution: When inside the computer please be sure you're
aware of the potential damage that can be caused by ESD.
On the computer
motherboard locate the BIOS clear / password
jumper or dipswitch and change its position.
This jumper is often labeled CLEAR, CLEAR CMOS, JCMOS1, CLR, CLRPWD, PASSWD, PASSWORD,
PSWD or PWD as shown in the picture to the right. To change the jumper simply
remove it from the two pins its currently on so that it covers the pin that is
not covered. For example, in the picture to the right pins 1 and 2 are covered,
you'd remove the jumper and put it on pins 2 and 3.
Once this jumper has been changed, turn on the computer
and the password should be cleared. Once cleared, turn the computer off
and return the jumper or dipswitch to its original position.
The location of the jumpers or dipswitches are dependent on the
manufacturer of the computer and motherboard. However, below are some general
ideas on where to find it. Remember that most motherboards could have dozens of
different jumpers, make sure you're changing the CMOS jumper and not something
else. If these general suggestions do not help refer to your motherboard /
computer documentation or skip to the next step.
Removing
the CMOS battery like the one shown in the picture to the right will cause the
system to loose all CMOS settings including the password. To do this locate and remove the
CMOS battery on the motherboard
for at least five-minutes. After this has been done put the battery back into
the computer and turn it back on.
Jump the CMOS solder beads
Older computers and especially older laptops don't have
jumpers
or dipswitches and require the user to jump a pair of solder beads on a
circuit
board. The identification and location of these solder beads can vary
and if not available in computer documentation is only obtainable
through the computer manufacturer.
If you've identified the solder beads they can be jumped by
placing a flat-head screwdriver over the two beads and leaving it on those beads
while turning on the computer. Once the computer has booted turn off the
computer and then remove the screwdriver.
PLEASE ACCEPTT
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