First you can try cleaning your fan exhaust vents, this should be done before you try and open the computer. Steps to doing this can be found here Can I used compressed air on my exhaust vents?. If this does not solve the problem then you will need to check the fan to see if either it needs to be cleaned or in the worst case scenario replaced. In order to do this you will need to remove the keyboard. This can be done by first using a plastic opening tool to pry the long plastic strip that is above the keyboard. Next you will need to remove the four screws that hold the keyboard in place. Once the screws have been removed you will notice that the keyboard is attached by seven tabs. These tabs slide under the plastic strip at the bottom of the keyboard setting. Remove the keyboard and then disconnect the three controllers attached to the motherboard. You will need to remove the motherboard in order to access the fan. This can be done by first removing the screw that holds the CD_ROM in place, when the screw...
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