Replace the complete key board and mouse kit
check your setting and configurations at bios. and try one more thing connect with usb mouse and key board of your any other computer avaliable
We have arrived at the opinion that while replacing the key board there are 99.9% chances you have connected thte connectors for mouse and key board in opposite direction. Once this had happened with me also accidently.
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i tried that too master. it didnt work
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