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Unable to reset bios password - removing coin cell battery had no effect

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Resetting the BIOS Password using Hardware 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.
Many RTC's require an external battery. If your RTC is one of this type, you can clear the BIOS password just by unsocketing the RTC and reseating it.

Posted on Feb 02, 2010

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Then you can try it out by removing the jumper.
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.

Posted on Feb 02, 2010

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1 Answer

How to remove password


which password, power on password or o/s password?
if its power on password you need to reset BIOS. by removing the coin cell battery on the motherboard together with a jumper just next to the coin cell. its called CMOS. Power on the computer and all the bios settings will be reset including the passsword. if its o/s passord that is created in the control panel you need to use a software called password xp.

Oct 04, 2013 | Computers & Internet

1 Answer

Bio passwod removal hp laptop


How to Reset an HP Laptop BIOS Password


Reset the password on any HP laptop.

Reset the BIOS password on an HP laptop computer when it has been forgotten or when preparing the laptop for sale to a new owner. Learn how to erase an unknown BIOS password by physically disconnecting the internal batteries. Avoid spending hundreds of dollars at a service center to make changes that can often be performed at home by anyone with the ability to take an HP laptop apart and put it back together again.

Items you will need

  • Small screwdriver set
  • Flashlight
Step 1

Power down the computer if necessary by holding the power button down for six seconds until the power shuts off.
Step 2

Disconnect the power cord from the HP laptop computer. Remove the battery by flipping the computer over onto its cover and releasing the battery clips as indicated by the illustrations on the bottom of the laptop or in the owner's manual. Lift the edge of the battery nearest the clips up first, then pull the battery out of the laptop.
Step 3

Remove the screws that hold the hard drive cover in place and remove the cover. Take the hard drive out of the laptop by removing the two retaining screws and pulling the drive gently away from the connector, then lifting the hard drive bracket or tray out of the computer.
Step 4

Remove the screws that hold the memory compartment cover in place, then remove the cover. Remove the memory modules from the sockets by spreading the metal retaining clips gently apart and allowing the module to spring upward. Pull the memory straight out of the socket at the angle it rests at when sprung from the retaining clips.
Step 5

Remove the Real Time Clock (RTC) coin cell battery from the memory compartment by pressing the retaining clip and pulling the coin cell battery out of the socket.
Step 6

Allow the computer to sit without the battery for an hour, then reinstall the memory and hard drive, but leave the coin cell battery and the main battery out of the system. Connect the AC power adapter to the system and power it on to clear the BIOS password.
Step 7

Power the system back down and remove the power cord to reinstall the coin cell battery and main battery.

hope this helps


John

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1 Answer

How do i remove or reset the bios password on an acer aspire 5741


The only way to reset your bios password is to remove your cmos battery. It is a small battery found attached to your motherboard. Most cmos battery is like button cell like this akshay163.gif
If you cannot locate your cmos battery then refer your motherboard manual. If you're computer is using a coin cell battery similar to the above example picture. Removing the battery is relatively simple. use your fingers to grab on the edge of the battery and pull it up and out of the container holding it. Some motherboards have a clip holding the battery down. If your computer has this clip you may need to use one had to move the clip up and the other hand to pull the battery out.
Unfortunately, not all CMOS batteries are removable; some manufactures will only allow a replacement battery to be added. If you're not using a coin cell battery and are not able to determine how to remove it refer to your motherboard or computer documentation for additional assistance in removing the battery or how to insert a new replacement battery.
After removing the battery then replace it.
Your bios password should now have been reset.
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1 Answer

I need to rest password in bios


Hi,
Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. BIOS password can be removed by temporarily disconnecting/ removing the RTC/ CMOS (Coin-cell) battery from the motherboard.
Disconnect the coin-cell battery from the system board and it will reset the BIOS to its default setting and the password would be gone.
Please Refer to Page 29, 106 & 79 of the REPAIR MANUAL IBM T40 for Battery removal, keyboard removal and RTC battery removal instructions.
The Backup Battery (RTC, CMOS) is located under the keyboard. So you have to remove the keyboard to access the battery. The above Manual from IBM shows the exact method/ instructions and pictures for laptop dis-assembly for the purpose.
If you are comfortable with working inside such electronics, you can't do it yourself, or else you may seek help from local laptop service professional.


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BIOS Password is stored in CMOS and retained by power provided by the CMOS (Coin-cell) Battery.
To Reset the BIOS Password, Remove the CMOS (Coin-cell) Battery from the motherboard for five minutes and restart the system. This will load the factory default settings and the password would be gone. Re-install the battery after the password is reset.

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BIOS Password is stored in CMOS and retained by power provided by the CMOS (Coin-cell) Battery.
To Reset the BIOS Password, Remove the CMOS (Coin-cell) Battery from the motherboard for five minutes and restart the system. This will load the factory default settings and the password would be gone. Re-install the battery after the password is rest.

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Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. BIOS password can be removed by temporarily disconnecting/ removing the RTC/ CMOS (Coin-cell) battery from the motherboard. Disconnect the coin-cell battery from the system board and it will reset the BIOS to its default setting and the password would be gone.
Please Refer to Page 77 of the REPAIR MANUAL HP 6720S.
If you can't do it yourself, you may seek help from local laptop service professional.

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Dont forget to appreciate the solution if I could have been of any help!
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Remove or disconnect the RTC/CMOS (coin-cell) battery from the motherboard. This will reset the BIOS to defaults and the password will be gone. Here is the Coin-cell information

Let me know if any further clarification/ assistance is required.

Good Luck!
CreativeTECH

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BIOS passwork can be removed by temporarily disconnecting/ removing the RTC/ CMOS (Coin-cell) battery from the motherboard. The battery is underneath the keyboard. Click here for disassembly instructions and here are the details and graphic illustration about CMOS battery from Dell official Site.
Disconnect the coin-cell battery cable connector from the system board connector. It will reset the BIOS to its default setting and the password would be gone.

GoodLuck!
Dont forget to appreciate the solution if I could have been of any help!
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PASSWORD


Remove the RTC battery for at least 15 monutes then replace. Get into BIOS and reset date and time. Removing the Coin-Cell Battery
  1. Follow the instructions in Before You Begin.

  2. Remove the hinge cover (see Removing the Hinge Cover).

  3. Remove the keyboard (see Removing the Keyboard).

  4. Insert a plastic scribe into the guide on the side of the coin-cell battery compartment, and pry out the battery.



Replacing the Coin-Cell Battery
  1. When you replace the battery, insert it at a 30-degree angle under the clip with the positive (identified by a plus [+] symbol) side up, and then push it into place.

  2. Replace the keyboard (see Replacing the Keyboard).

  3. Replace the hinge cover (see Replacing the Hinge Cover).


Oct 02, 2009 | Dell Inspiron 1501 Notebook

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