System clock not updating on Acer Aspire 5610Z

I have an Acer Aspire 5610Z where the system clock stops if I turn off the laptop. I then have to change to the right date in windows manually first, and then manually sync with a ntp server to get the right time. If I leave the computer on, it will automatically sync with the ntp server as long as the date is not scewed by more then 24 hours. That is what often happens when I turn off the laptop, the clock stops counting for the amount of time the computer is off - often more then 24 hours. I use Windows 7 on the laptop.

Is there some battery or something on the main board that I can change?
Any ideas?
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itniflAsked:
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nobusCommented:
you probably have a low, or bad bios battery
replace it if possible (some are soldered)

here they show you that- on another model :  https://www.youtube.com/watch?v=aUk1UxYOpW4
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andreasSystem AdminCommented:
On your laptop they are on the upper side of the mainboard near the Function keye, you need to open up your laptop and remove the upper cover,

sometimes this requires dismounting of the display and the ribbon cables to the display too.

Be very carefull if you break something your laptop is dead and a repair quite expensive or even impossible, depending on available replacement parts.
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joinaunionCommented:
Can you first check the time in your bios settings.
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Michael-BestCommented:
Each time you turn on the system, the Power-on Self Test (POST) is initiated.
If POST discovers errors in system operations at power-on, it displays error messages on screen
If you see 071 Error Message this means CMOS Battery Bad
To replace it you must disassemble the laptop to replace it.
Page 73
http://tim.id.au/laptops/acer/aspire%205610%20travelmate%204200.pdf
 
How to disassemble the laptop is detailed in the previous link also see:
http://www.insidemylaptop.com/disassemble-acer-aspire-5610z-laptop/

For more guides google: acer aspire 5610z disassembly

If you do not have 071 Error Message then the battery is good.

Go into BIOS by pressing F2 at start up and check the clock for correctness.

If none of the above then, you probably have a faulty Motherboard which will be expensive to replace, so you may prefer to live with having to reset the clock.

Good Luck
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Natty GregIn Theory (IT)Commented:
your bios battery is dead and needs to be replaced.
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itniflAuthor Commented:
I see no 071 Error Message, and the BIOS date and time is there, only it does not update.
I still believe the battery is dead, until I have tried to replace it. The motherboard was replaced with a new one for free in 2010 because of guarantee.
To replace the battery I need to remove the motherboard from the laptop case and thus unscrew a whole bunch of screws. I will let the problem be as it is until I take the time to do all that work.

Thank you for all replies.
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Michael-BestCommented:
Thanks for your reply.
If the BIOS date and time is out of sinc.  during power off periods, then you have a faulty Motherboard and or a bad CMOS Battery.
The POST error messages on screen should indicate which is bad...
I guess your warranty has expired for free service?
Good Luck.
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