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Hi i have a hp pavilion lap top ze4315. i am

Hi i have a hp pavilion lap top ze4315. i am have trouble with reloading software. in the middle of prosses it shuts down then reboots and starts over. how do i clean heat sink

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First, get a small Phillips head screwdriver, a credit card, and something like an egg carton to store all the screws you'll pull out. You'll also need something to clean the dust off the heatsink and fans--a can of compressed air is by far the best choice for this.

Note: READ ALL THE DIRECTIONS BEFORE YOU START. This is not an easy thing to do, especially your first time. Be careful. This is not a quick job either; I'd budget at least two hours of solid work, and it may take the whole afternoon.

Step 1: Shut the machine down, unplug it, and remove the battery. It might also be wise to back up your important data.

Step 2: Open up the cover on the bottom of the laptop where the WiFi card sits. Carefully unplug the antenna cables from this card.

Step 3: On the back of the laptop there should be several screws near the display hinge. Unscrew these and remove them. Then open the display all the way until it is flat. Use the credit card to help you remove the trim above the keyboard where the power button is located. This trim is held in by clips and will make several unnerving popping sounds when you pull it off. Just be careful and everything should work out fine.

Step 4: Unscrew the keyboard and carefully lift it up. Follow the ribbon cable on the bottom of the keyboard to where it connects to the motherboard. Unplug it (carefully!) and set the keyboard aside. Also unscrew the circuit board where the power button is located and remove that; it is also connected via a cable that needs to be unplugged. Also unscrew and unplug the speakers.

Step 5: Close the screen and turn the computer over. Unscrew all the screws on the bottom of the machine. There should be about 10-15, I think. Make sure to remove the screws stuck under the little rubber plugs along the front of the computer. A couple of these hold the hard drive in place; remove the hard drive. Under the hard drive there are a few screws in the case; unscrew those as well. Look around on the sides of the laptop; there may be a few screws on the sides as well. They need to come out too.

Step 6: Turn the machine back over and open the screen.Unplug the display cable and unscrew the four screws that hold the hinge on the display to the computer. Set the display aside. You may have to unscrew the little circuit boards near the hinges; those are the WiFi antennas.

Step 7: Remove all the screws in the metal plate underneath the keyboard. Also unplug any relevant ribbon cables that are connected to the motherboard and the top case (the palm rest part) of the laptop. The most notable of these is the trackpad connector, if you can get to it. You should also pull the wifi antenna connectors up through the machine now.

Step 8: Carefully lift the top case up, using the credit card to help you unsnap any clips holding it in place. Go slowly and don't force it because you may have missed a screw, either on the bottom or the top of the laptop. Also watch out for any connectors you missed. Remove the top case and set it aside.

Step 9: Unscrew the heatsink carefully. This is probably attached to the fan, so be careful. Also unplug the fan-but be VERY careful when you do this. Once I accidentally pulled the entire connector off and had to resolder it onto the motherboard. Take my word for it, that is not fun. Unscrew the fan, and you should be able to lift the heatsink and fan out to clean them.

Step 10: Follow these directions in reverse to put the machine back together. Go slowly and make sure you don't forget any screws or connectors. If you do, go back and find out where they go.

Good luck!

Posted on Sep 05, 2009

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