Question about HP Pavilion a350n PC Desktop

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Clock in computer will not maintain time and date

I have a hp Pavillion desk top computer model a350n. The clock in the computer will not maintain correct time and date if power is removed from computer and then repowered the next day. Time reverts to 1/1/2001 1:00 am. If power remains to computer after computer is turned off date and time are correct on startup. What is the cause? Is there a cmos battery inside the computer? Would a dead cmos battery cause this? Would there be other obvious problems if the battery was dead? Where would it be located inside?

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Yes it very probably is the CMOS battery, time is kept counting electric pulses, when the computer is turned on there is power and memory to do this, but when it is turned off it relays on the battery to keep this an some other settings, maybe you're receiving a warning at boot time. Check this guide for replacing such batteries:

http://www.computerhope.com/issues/ch000239.htm

Posted on May 15, 2010

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Posted on Jan 02, 2017

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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

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