I purchased my a-70 toshiba laptop at the end of august, and recently it's started making loud grinding type noises whenever I start up the computer. I've tried cleaning out the fan, and it worked for a while, but it's stopped solving the problem. When I'm running the computer, the fan is very loud, even when I have it set on silent mode. Also, the sound on my computer has become really quiet, whether playing on the speakers or with head phones. How bad is this situation?