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Shut down the laptop and remove the battery . Now allow 15 minutes and then replace the battery back to boot again. If the PC does not respond with the keys, it must be checked if the cat had soiled the key pad and there is a short within.
there must be an function key on your keyboard.....and several symbols on other keys ...with same colour may be...if you press function(fn)key + the key on which symbol is made the same task is done....for example a key on your keyboard has a crescent moon type symbol...if you use it with function key..your lappy will hibernate...some other keys may be for brigthness of your screen ,increasing and decreasing sound etc..