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How to replace the cmos battery in a systemaxmodel#N241S1

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It's the round silver battery right on the motherboard.... unplug the computer first. there is small tab that you move sideways with your fingernail. when that clip is moved far enough the battery will pop out of the holder... to replace the battery put it back into the holder with the round side toward the clip and push down gently... it should snap into place.

Robert

Posted on Sep 22, 2008

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Replace cmos battery of optiplex 740


hello
Here is how the cmos battery looks like(look at video) at 2:15 running time of video shows you the cmos battery that is simular to a big watch battery. here a link for battery
http://www.ebay.com/itm/Dell-OptiPlex-Desktop-New-Motherboard-Lithium-Battery-Bios-CMOS-3V-Clock-CR-2032-/200692910229?pt=LH_DefaultDomain_0&hash=item2eba3ac895

Feb 22, 2013 | Dell OptiPlex 740 PC Desktop

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How to verify that the CMOS battery needs to replace


<p>The CMOS battery is named after the Complementary Metal Oxide Semiconductor power. The CMOS has the current date and time functions for desktop and laptop computers. It allows the computer to automatically adjust the time, even on computers that are disconnected for long time. When a computer no longer has the date and time and forget it on every boot, the CMOS battery probably needs replacing. Some computers have messages when the battery is weak, while others just lose the current date and time after each shutdown.<br /> <p>Time & Date Errors<span> </span><br /> <p><span> </span><br /> <p>1. Turn on the computer. Look in the task bar at the bottom right. Make sure the date and time is set correctly. Double-click the time and click the up or down arrow to switch to the correct time. Click on the arrow next to month to change the month. Click "OK" when finished.<br /> <p><br /> <p>2. Turn off the computer. Wait 3 to 5 minutes and start the machine.<br /> <p><br /> <p>3. Look on the taskbar to see if time was lost and said a strange date January 1, 2000. Replace the CMOS battery, if this is the case.<br /> <p><br /> <p>CMOS Error Message<br /> <p>1. Look for error messages like "CMOS checksum error", "CMOS Read Error" or "CMOS battery failure" when you start your computer. These errors are caused in the machines shut down for several months or when the CMOS must be replaced.<br /> <p><br /> <p>2. Let the computer on for 24 hours. Restart the computer and find the error.<br /> <p><br /> <p>3. Change the CMOS as the return error.<br />

on Jun 21, 2011 | PC Desktops

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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 | PC Desktops

1 Answer

Where is blinking amber light located on dell


Replace CMOS Battery.

1. Locate your CMOS battery
2. Obtain battery information
3. Removing the battery
4. Removing the battery
5. Enter CMOS values

This link will guide you. CMOS

Thank you for posting..

Jun 30, 2011 | Dell OptiPlex GX520 PC Desktop

1 Answer

Where is the internal battery and what is the part number


Look in cybernet knowledgebase here for the solution:

http://www.cybernetman.com//kb/index.cfm/fuseaction/home.viewArticles/articleId/29

How do I replace the CMOS Battery in my ZPC? Cause - CMOS battery has gone bad
When replacing the CMOS battery in the ZPC, be sure the External Power Supply is unplugged and no accessories are plugged into the unit. Carefully remove the 5 bottom screws and the 2 screws on the back to remove the keytop. Once the unit is open, simply remove the bad battery and replace it with the new one. We use a standard 3V Lithium battery that can be found in most stores. When everything is put back together, be sure to press the CMOS reset switch on the side of the unit. Boot up the machine and repeatedly press the delete key to enter the CMOS Menu. Choose to Load Optimized Defaults, then press F10 to save and exit. The PC will now boot up normally

Jan 13, 2011 | Cybernet Systems ZPC-9000 PC Desktop

1 Answer

I replaced the cmos battery of my asus eee top et1602, now the compunter doesn't boot


remove the cmos battery and with a piece of conductive wire shrt negative and positive terminals for around 5 seconds then replace the cmos battery, ensure power lead is disconected, this may help
cheers
paul

Dec 22, 2010 | ASUS Eee Top ET1602 PC Desktop

1 Answer

Bad cmos dell motherboard


If u changed the CMOS battery then it should not show the f1 continue . first remove your BIOS chip on the motherboard and then replace CMOS battery and then replace it again after 5 minutes. your problem will be solved

Aug 26, 2009 | PC Desktops

1 Answer

Sir my motherboard is philips award modular bios v4.51pg,i forgot the cmos password,how to clear the cmos


Try removing the cmos battery for 30 seconds then replace it. If you open the case you will see a coin cell battery. This is the cmos battery. Removing the battery should reset the bios to factory default settings.

Dec 13, 2008 | PC Desktops

3 Answers

Bypassing password


short out the jumper pins labeled CMOS

Jul 09, 2008 | Fujitsu Siemens Celsius R610 PC Desktop

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