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How to remove cmos battery on dell precision M4600

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Posted on Jan 02, 2017

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SOURCE: how to remove the cmos battery on a dell precision

Here is the link to removing the reserve battery. http://support.dell.com/support/edocs/systems/wsM60/SM_En/reserve.htm#1123661
However, if you are trying to bypass a BIOS or HDD password removing the battery will have no effect. Those can only be removed by tech support or a hardware replacement.

Posted on Dec 05, 2009

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Dell M4600 boots up 1/2 way


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CMOS Battery


Hi Peter, well the good news is the batter is very cheap and easily spotted (if you can find a highly waxed green caterpillar shaped piece - that will be your CMOS battery). Google image Dell Precision M50 battery and you'll find plenty. Looks like the connectors are fairly straight forward to work with
Remember to have the laptop off and away from the mains - and wear an anti static wrist if possible. Regards

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How to reset the bios pasword


The most common way that we know on how to reset or clear the BIOS password is to physically remove the power from the computer by disconnecting the power plug and then removing a battery for 30 minutes from the motherboard.

Another way is to reset the clear CMOS jumper on the motherboard itself.
Both of the 2 methods mentioned works because most motherboards use a battery to sustain the BIOS/CMOS settings for the motherboards PROM chip.
So by cutting off cmos the battery power, the BIOS/CMOS settings will be erased.
Hope this helps

Feb 29, 2012 | Dell Latitude E6400/ 6400 ATG Laptops /...

1 Answer

Hello I have to replace the bios battery on my


It is CMOS battery cell.You can buy it from nearest computer shop. It looks like below image. Click here It is CMOS cell which give voltage to bios to save data. Let me know if you need further assistance. Thanks for using FixYa.

Oct 11, 2010 | Dell Precision Workstation 670 PC Desktop

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How to break bios password for dell precision m70 laptop


Hi,
The only way for you to remove BIOS password is to remove the CMOS battery inside the laptop. You can go to support dot dell dot com.
Cheers!!

Sep 02, 2010 | Dell Precision M70 Notebook

1 Answer

How to remove the cmos battery on a dell precision m60


Here is the link to removing the reserve battery. http://support.dell.com/support/edocs/systems/wsM60/SM_En/reserve.htm#1123661
However, if you are trying to bypass a BIOS or HDD password removing the battery will have no effect. Those can only be removed by tech support or a hardware replacement.

Dec 05, 2009 | Dell Precision M60 Notebook

1 Answer

How do I reset my lost bios password for Dell Precision M70


Hi,
If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.
On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.
If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.
The BIOS password may be cleared from a Dell Optiplex by removing the password jumper (PSWD) from the motherboard.
The location of the password jumper on a Dell Optiplex motherboard can be found by reviewing the Optiplex User Guides.
For most Dell Optiplex desktops, the steps to reset a BIOS password and clear all CMOS settings are:
  • Locate the 3-pin CMOS password reset jumper on the system board.
  • Remove the jumper plug from pins 1 and 2.
  • Place the jumper plug on pins 2 and 3 and wait approximately 5 seconds.
  • Replace the jumper plug on pins 1 and 2.
Each Dell Inspiron has a master password which will clear the BIOS password. You can get this number by calling Dell Technical Support at (800)624-9896.
Dell Technical Support will request the Service Tag and Express Service Code from the bottom of your Inspiron.

Thank You,
Your Support Tech.
Manish Shirsikar,
Fixya.com

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1 Answer

Dell Precision 340 will not boot past the bios


It is possible that one of the drives are causing the proble. Disconnect all drives Hard drives, CD, DVD, BLUERAY,Floppy etx and turn the system on if it boots then shut it down and connect the drives one at a time until you find the one at fault.. If this fails then the problem resides in the main board itself, YOu said you cleard the cmos, try reseating the processor (removing and then putting it back) then flashing the bios (clear the cmos) ,, if that fails then you may need to replace the mainboard.

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