yea look under the cover where the hard drive siits and their should be battery that is the battery that keeps cmos or also

smart ass

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Jan 25, 2014
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yea look under the cover where the hard drive siits and their should be battery that is the battery that keeps cmos or also know as biso so po that battery out and cmos should forget everything until you boot itback up and then it will start to find onboard devices (ex:wireless ,vga,sound) try this it worked for me lotts of times hope this helps