Question about Acer Aspire AX3400-U2022 PT.SE202.007 Desktop PC and Microsoft Office Home and Student 2010 Product ... (PTSE202007BUNDLE)

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Replace the cmos battery

It loses time when switched off

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Lol i just answered this earlier. Its on the motherboard near the CPU generally looks like a big watch battery. Held in by a pressure pin gently lift the pin the battery will dislodge take it to Walmart or a jewlery store they will match it up for like $5...You will actually need to open the side panel on the tower to get to it make SURE you have the pc unplugged from all power and let it sit about 5 minutes to discharge totally before you open the tower. A large rubberband around your wrist wouldnt hurt either for static shock

Posted on Mar 31, 2015

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My computer won't keep time!


If your computer continues to lose time or doesn't keep the correct time, your CMOS battery might be bad. Try this, reset the time on your computer and check it 24 hrs later if it is off by more than a few minutes or hours then the CMOS battery is probably bad and needs replacing.The CMOS battery is just about the same as your watch battery and doesn't cost much but is tricky to replace if your not careful.

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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 | Computers & Internet

1 Answer

Cmos setting wrong


It sounds like your CMOS battery has died, it is relatively easy to replace just remember to ground yourself (Touch a metal object like a radiator that is unpainted for a couple of seconds) before touching anything inside your PC. Detailed instructions how to do this at link below
http://www.computerhope.com/issues/ch000...

All Mother Boards I have seen and I've seen hundreds will lose the Time and Date first. I'm pretty sure it is a design feature to give you warning of a failing CMOS battery. If you don't change the batt soon after it starts losing the Time and Date it then begins to lose everything.

Dec 04, 2012 | Computers & Internet

1 Answer

Is my CMOS battery the problem to the time and date not automatically correcting itself, or is it something else?


The CMOS battery is the main cause of your time resetting. Although it usually resets further back. Double check your time setting in the operating system itself. If everything is correct then the source of the problem is more then likely the CMOS battery. Batteries are pretty cheap so not hard to replace. If it is a desktop computer (if you're comfortable with it) open up you computer and what looks similar to a watch battery and that is what you will need to replace.
Note* IF it is the CMOS/ BIOS battery it will only reset the time when you lose power to the computer or turn it off.

Oct 04, 2012 | Computers & Internet

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Hello, when I put my pc running it says CMOS checksum error press F1 to enter or Del to enter setup, but I press Del when I save changes "save and exit" the computer restarts, but this time...


The Checksum error basically shows that boot settings which were previously set has been changed or reset. This usually happens when the battery loses its charge and thus fail to retain the CMOS settings. This can also be caused by a power surge or a damaged motherboard. But most of the times it would be the battery problem.

You can try replacing the CMOS battery and enter the values back into CMOS or reset values to default. Then switch off and boot up again.
Hope this works. Good Luck. ~SmokinJoe~

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You will have to open up the computer to find out. You can leave it off forever and it will be fine as long as you don't bring a magnet around it. The CMOS battery is typically a circular button cell type battery found on the motherboard.

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Most probably your CMOS battery needs replacing.

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Sounds like you need to change the CMOS battery, the time being wrong everytime you boot is a good sign but also it losing its settings in bios is also another sign

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