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PowerEdge 2900 battery replacment

Hi
I have a PowerEdge 2900 that the clock keep loosing time. Minutes in a day.
I adjust the clock on the Bios but it still loosing time.
I assume is the bios battery but all I can find on the internet is how to replace the raid battery. I don't think this is related to the bios clock. Any idea were is located and if it can be changed?
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infedonetwork
Asked:
infedonetwork
4 Solutions
 
Thomas GrassiSystems AdministratorCommented:
Check this out

http://www.dell.com/support/home/us/en/19/product-support/product/poweredge-2900/manuals

Select Hardware Owners manual it is a PDF file

Page 141 and 142 show you the Battery
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PowerEdgeTechIT ConsultantCommented:
It is on the top side of the motherboard, under the expansion card cage and is easily replaceable (and obtainable) - and most likely your culprit if your system is losing or resetting time.  If the OS is getting its time from some external/internal time service, you might check to see if it is working correctly.  Be sure to power off, unplug the system, and hold the power button down for 5 seconds before replacing it.
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Michael DyerCommented:
Follow the instructions on this page through removing the PCI card cage:

http://velocityanne.wordpress.com/2013/11/05/removing-a-dell-poweredge-2900-system-board/

Once the cage is out you will see the little round battery on the motherboard.
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andyalderSaggar makers bottom knockerCommented:
When you power it on after replacing the CMOS battery it probably won't boot because the default BIOS setting is to disable the internal storage. Before swapping it reboot and go into BIOS and take a look at the internal storage option so you know what it's meant to be set to. Then you will be ready to set it back to the correct setting.
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infedonetworkAuthor Commented:
I replace the bios battery and the time still going behind with 4 minutes every 6 hours.
Not sure what else it can be.
Is not the windows time but it's the bios time that fall behind and windows just follow.
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andyalderSaggar makers bottom knockerCommented:
Probably a faulty motherboard but why not set it to use NTP instead?
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