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My desktop PC won't take my password, could it be caused by bad CMOS battery? This computer has not been used for over a year.

I am the only user, and my password is absolutely correct. If the CMOS battery is bad, is my password remains the same after replacing the battery? If not, how do I reset a new password?

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  • 27,725 Answers

The cmos battery holds your password and boot order settings on some motherboards removing the cmos battery will not remove password its held by a small chip which has back up power designed for this

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer Windows Advanced Options Menu Please select an option: Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode Start Windows Normally
Reboot
Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice select safe mode with command prompt Click start run type cmd press Enter black screen should open DOS mode this will vary depending on your operating system type in net user username For eg. If you want to change administrator password , type net user Administrator It will prompt you to enter the new password. Enter the new password and the password is changed if this fails you will need to Select safe mode with networking to download you could download all of these or just one save them to a usb drive for later use if one fails to remove the password Windows Password Recovery Basic http://majorgeeks.com/CmosPwd_d239.html A CMOS BIOS password recovery tool Editors note: This tool should only be used by experienced computer users. Please see the enclosed read me if you would like to run it from Windows. Failure to follow instructions (from Windows) will cause your anti-virus to flag this as a virus. http://majorgeeks.com/Dr._Freeware_System_Utilities_d6416.html Dr.Freeware System Utilities which includes data recovery software, data backup, password reset tools for Windows helps you to maintain your system. Dr.Freeware is freeware, you can download and use it for free. Hope this helps.

Posted on Jan 16, 2013

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To reset the new password you have to find and remove the battery that is a little watch type batery, to cut power to the storage of the password, for five or ten min. this will reset the password. good luck!

Posted on Jan 16, 2013

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Posted on Jan 02, 2017

sir fixalot
  • 146 Answers

SOURCE: CMOS battery replacement

Your Pc should have an Intel E210882 motherboard in it.
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer
is not plugged into a wall socket, the battery has an estimated life of three years. When the
computer is plugged in, the standby current from the power supply extends the life of the battery.
The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.
When the voltage drops below a certain level, the BIOS Setup program settings stored in CMOS
RAM (for example, the date and time) might not be accurate. Replace the battery with an
equivalent one. Figure 14 shows the location of the battery.
These batteries are very common and can be purchased at Wal-Mart, Walgreens, Etc...
Here is a link to the motherboard manual with battery replacement procedures:
http://www.asi.com.au/support/Drivers/V206/Manual/SR_English.pdf

Posted on Jan 04, 2008

  • 1335 Answers

SOURCE: Clock in computer will not maintain time and date

There is a wafer lithium battery that maintains the power onboard the motherboard to maintain settings. The batter is located on the top side about midboard. Open the side of the computer case so that you have access to the motherboard. Before you remove the battery, you may want to carefully vacuum out the dust in the case and then use a can of air (available from Radio Shack or comuter supply store) to blow out the remaining dust.
You will need a replacement CR2032 Lithium batteery.
To replace the battery:
1 Remove the side panel that has the thumbscrews. See page 99.
2 Gently lay the PC on its side.
3 Remove any cabling, if necessary, to reach the battery.
4 Remove any memory modules, if necessary, to reach the battery.
5 With a flat screwdriver, press the metal latch that holds the battery in its
socket away from the battery. The battery will pop out.
6 Install the new CR2032 battery in the socket, with the positive (+) side
facing up.
.
This should take care of your lost date.
Please rate this solution. Thanks.

Posted on Mar 22, 2010

Testimonial: "kitajib answered my question and solved my problem within 1/2 hour of posting my problem. He was able to tell me how to access the part."

  • 1 Answer

SOURCE: I lost all password for

Lots of sites say to move the PSWD jumper (on the motherboard) from pins 1&2 to pins 3&4, or something like that. However on my Optiplex 360 I found that the PSWD jumper had only 2 pins. By trial and error I found that removing the jumper from these two pins while the system was off allowed me to boot the system with BIOS password disabled. I was then able to change BIOS settings (and install Linux - yeah!!).

Posted on Jan 03, 2011

  • 85 Answers

SOURCE: I lost the password from

hi there,
if you have access to another computer and the internet, you can download software called password reset/recovery. these come with instructions on how to use. just use one of these to recover/reset your password and you should be able to access your computer again. Hope this helps :)

Posted on Jan 18, 2011

  • 357 Answers

SOURCE: HP Compaq dc7600 convertible minitower

Try installing the system board driver and chpset driver.
You can also try setting the BIOS to factory default settings.
If you have a volt meter check to see if there is votage at the battery connector, and the power supply connectors are plugged into the mother board, which I suppose you are, just an idea, if the above suggestions don't resolve your issue.
I hope this helped.
Good luck and have a fantastic day.

Posted on May 24, 2011

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2 Answers

How do I fix my CMOS Battery Low error so I can correct the Time and Date since it's stuck on the 01/01/2004 date and won't save in my BIOS?


This is usually a very short and sweet step to complete.
After you have changed the CMOS battery over to a new one all you should have to do is go into BIOS set the date, the time and the year. Save the settings in the BIOS, exit and restart the computer.
You have to set the date, time and year in the BIOS first then change it on the desktop.

The proper battery to use for CMOS is a C2023 coin cell battery.

Hope this helps

Jan 12, 2015 | Lenovo 3000 J205 9686-A12 Desktop Pc -...

Tip

CMOS Checksum error


<b>Issue:</b><br /> CMOS Checksum Bad or CMOS Date/Time Not Set<br /> <br /> <img src="matrix12_1.jpg" /> <br /> <br /> <b>Cause:</b><br /> This issue is caused when the CMOS values are incorrect. This issue can occur because of any of the below possibilities.<br /> * Bad or old CMOS battery. <br /> * BIOS update<br /> <br /> <b>Workaround 1:</b><br /> 1. Disconnecting power from computer without shutting down computer.<br /> 2. Attempt to reboot the computer. If error still occurs after rebooting the computer enter CMOS setup and check all values, this includes verifying the time and date are correct. Once everything has been verified and/or changed make sure you save and exit CMOS setup. <br /> 3. If you have a Phoenix BIOS and have an option for 'Reset Configuration Data', set this value to 'Yes' and save and exit the CMOS. <br /> <p>4. If the computer was had the power disconnected while it was still running it is possible this could cause the CMOS to become corrupt. Ensure that the computer is ready to be shut off before turning off the computer. If you have a laptop computer ensure that the battery is charged before disconnecting the power connection. <br /> 5. If the CMOS values have become corrupted entering the values in CMOS setup and saving and exiting CMOS should resolve your issues.<br /> <p><b>Note:</b> If this issue continues to occur after you turn off your computer off it is possible that the CMOS battery may be failing or already bad. Before considering replacing the CMOS battery try leaving your computer on for several days. <br /> <b>Workaround 2:</b><br /> <p>If you performed workaround 1 and the error occurs again after a complete power down (i..e. removing the power cord), the CMOS battery is likely bad. Most systems use a small coin style lithium battery. These often last 3-6 years, but at some point run out of juice and need to be replaced. For desktops, your system manual or motherboard manual should specify the type of battery and location on the motherboard. For laptops, it is often very difficult to access and may require a professional to replace it. To replace the battery on a desktop system:<br /> 1. Turn off the system and remove the power plug.<br /> 2. Remove the case or side panel to access the motherboard. <br /> 3. Look for a round silver coin cell, typically in a black holder.<br /> <br /> <br /> <img src="matrix12_0.jpg" /> <br /> 4. Remove the battery while noting which way the battery is located. You may need a small flat screwdriver to release the side clip. <br /> 5. Install the replacement battery with the same battery type, being careful to insert it in the same direction as the removed battery (or using the polarity marked on the holder or manual). <br /> 6. Reassemble the case and power. <br /> 7. Turn on the power. You will get the CMOS Checksum Bad error once more, but it should be the last time. Go into the BIOS setup and set the date and time, and any other options you prefer.<br /> <br /> <br /> Hope this will help...Your response is very much appreciated...

on Jan 24, 2011 | Computers & Internet

1 Answer

I forgot the bios password


You'll have to open up your computer and reset the CMOS battery which will clear the BIOS password. To reset the CMOS, locate the battery and remove it. Then using a pair a tweezers to create a short where the battery was. Place the battery back in and your BIOS should be reset.

Oct 19, 2012 | HP Pavilion Slimline s3700f PC Desktop

1 Answer

How can i remove setup password ?


Hi,

If you short the CMOS jumper on the motherboard , you can reset the setup password . Find the CMOS jumper near to the CMOS battery . If you can't find the jumper , just remove the CMOS battery and smps power cord . Wait 3 min and re insert the battery . Now check it will not ask setup password .

Thanks

Nov 28, 2011 | IBM NetVista PC Desktop

1 Answer

I have a compaq Presario S4100NX that won't keep time. I have replaced the cmos battery, I flashed the bios to the latest version, I reset the bios to manually load default setup, but still no joy....


Does it loose time even with power cable connected? If so I would say your MB has a bad RTC chip and you need to replace the motherboard. Other things to check are make sure the CMOS battery your using is BRAND NEW with a good expiration date. That the contacts on the MB are making firm contact with the battery. Also check to make sure the contacts are CLEAN... no residue on them.

Sep 06, 2011 | HP Compaq Presario S4100NX PC Desktop

1 Answer

Forgot my password


In computing, BIOS (basic input output settings) refers to the information stored regarding a computer's hardware configuration, the system date and time and any applied password. This information is known as the BIOS or CMOS settings--the BIOS is stored on a small battery-powered semiconductor chip known as the CMOS (complementary metal oxide semiconductor). Having a CMOS or BIOS password restricts unauthorized changes to the system's hardware configuration and, in some computers, may even be required for booting. A lost password may be reset by removing the CMOS battery, clearing the motherboard jumper or using a software-based password cracker.

1.Shut down the laptop and unplug its power cord from the wall outlet. Remove the battery cover under the laptop and gently raise the battery from its dock. Unplug any peripheral devices with a live power source connected to the laptop, such as a modem or printer.
2.Locate and remove the CMOS battery. Refer to your user manual or visit the manufacturer's website for your laptop's architecture. Follow manufacturer recommended procedure to access and remove the CMOS battery. Depending on make and model, this procedure may be more involved for some laptops and not others. The CMOS battery is a flat circular shape and resembles a watch battery.
3.Wait 30 minutes and then put the battery back in. This will erase all information stored in BIOS. Assemble the laptop, making sure you leave no loose connections. Power up the laptop and press "F1" when you get the "CMOS cheksum error" message. Type in a new password.

Clearing CMOS Jumper

1.Turn off the laptop and access the motherboard following recommended procedures.
2.Locate the jumper in the motherboard. If you do not have your motherboard documentation, locate a single jumper near the CMOS battery. In some laptops, the jumper may also be labeled in the motherboard. Put the jumper setting to "Clear" and reassemble the laptop.
3.Turn on the computer and hit "F1" when the "CMOS checksum error" message is displayed. Navigate through the BIOS settings interface to load default settings and apply a new password.

Using Password Remover

1.Download a software-based BIOS password cracker. There are numerous free programs able to recover or delete CMOS or BIOS passwords from virtually all motherboard brands. Download the file from a trusted source and save it to the desktop.
2.Burn the installed file to a CD using image burner software. Insert the CD and access the password remover tool.
3.Note the password or use the program to set a new password.

I hope you find it very helpful. Thank you.

Aug 22, 2011 | Acer Aspire One PC Notebook

1 Answer

Computer won't boot pass window screen. ..


if there is password when you start the system then switch off the laptop remove the battery then remove the cmos battery and place battery and switch on the computer then switch of the laptop and replace cmos battery and switch on the laptop the password will reset

Jun 02, 2011 | Computers & Internet

1 Answer

My sister gave me a Compaq evo computer. When i turn it on it goes right to a screen that says Power-on password with a picture of a key. She doesn't know what the password was and it doesn't let...


Hi,
It seems to be BIOS password, if you don't remember or don't have the BIOS password you have to reset the password by opening your CPU cover and removing the CMOS coin battery, this will reset the BIOS password but dont forget to return back the battery and start using your PC.

Regards,
JJ

May 15, 2011 | Compaq Evo D500 PC Desktop

3 Answers

I forgot my bios password, i want to reset my bios password


A. By Removing the CMOS Battery:

cmos_battery.jpg Almost all motherboards use a small coin sized CMOS battery to store all BIOS settings along with the password. To reset the password, unplug the PC, open the cabinet and remove the CMOS battery for approx. 15-30 minutes and then put it back. It'll reset all BIOS settings as well as the password and you'll need to re-enter all settings.
If it fails, then try to remove the battery for at least one hour.
B. By Using the Motherboard 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.

Jan 30, 2011 | Acer Aspire (AST180-US340B) PC Desktop

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