How to Clear CMOS on an Asus A7NBX-E Motherboard
Occasionally, it is possible to make a change to the configuration of a motherboard that results in the computer no longer being able to start. This is commonly caused by a failed attempt to "overclock" the processor by running it at a higher-than-rated speed. Luckily, the complimentary metal-oxide-semiconductor that stores this configuration information can be erased even if the computer does not start. Clear the CMOS on your ASUS A7NBX-E motherboard if you have made a change in the motherboard setup utility that prevents the computer from starting.
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Instructions
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Shut your computer down and disconnect all of the cables from the back and front. Move the computer tower to a solid surface that has room for you to work.
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Open the computer tower. Some towers have screws on the back that must be removed, while some "tool-less" models have a button or lever that releases the cover.
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3
Lay the open computer tower on its side so that the motherboard can be accessed.
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4
Remove the silver coin-cell battery from its socket on the motherboard. The battery is located in front of the middle white PCI expansion slot, next to a chip labeled "nVIDIA."
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Locate a set of three metal pins labeled "CLRTC1" next to the socket from which you removed the battery. Two of the metal pins--numbered 1 and 2--are covered by a blue plastic piece called a "jumper." Move the jumper so that it covers pins 2 and 3.
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Wait 10 seconds, then move the jumper back to pins 1 and 2.
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Push the coin-cell battery back into its socket so that the positive side--marked with a "+" etching--faces up.
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Close the computer tower, return it to its original location and replace all of the cables.
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Turn the computer on and immediately begin tapping the "Delete" key until the setup utility for the ASUS A7NBX-E motherboard loads.
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Use the motherboard setup utility to re-enter the date and time and any other custom configurations that you entered when you built your computer.
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References
- Photo Credit motherboard image by dinostock from Fotolia.com
