Introduction
If the system clock or the BIOS (Basic Input/Output System) settings reset when the netbook is turned off, the CMOS (Complementary Metal-Oxide Semiconductor) battery may need to be replaced.
The CMOS battery should be replaced with a 3-volt 2032-size coin battery.
Tools
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Hold the netbook top-side down with the lid closed.
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Slide the plastic battery release latches towards the lock symbols.
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Turn the netbook to view its edge.
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Press both orange eject buttons simultaneously, and use a spudger to pry off the back case.
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Conclusion
To reassemble your device, follow these instructions in reverse order.
One comment
after need CMOS reset. Screen is black. Is there an easy way on my HP Mini 210?