Question about Computers & Internet
The CMOS battery is the 1 inch stainless battery in the motherboard. removing it and then returning it back resets already the CMOS settings.
Posted on Mar 28, 2011
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Posted on Jan 02, 2017
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Mar 29, 2011 | Dell Inspiron 1300 Notebook
on Jan 04, 2011 | Computers & Internet
Generic BIOS / CMOS passwords
Try using generic CMOS passwords. A complete listing of these passwords can be found on
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
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.
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
or dipswitches and require the user to jump a pair of solder beads on a
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.
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