There are two large screws either side of the battery compartment and three tiny screws inside the battery compartment. All other screws are mid-sized and all the same. One of the screws above the hard drive holds the CD drawer in place.
Once you have removed the screws you can slide out the CD tray. The final screw is inside the memory compartment. I missed this one at first and the case will not come off unless it is removed. Carefully remove the base of the casing. You might have to go around the seam gently popping it out of it's clips. If you haven't done so already put on a pair of surgical gloves to help keep you clean and help to prevent contaminating surfaces when you touch them. The fan to be replaced can be seen to the right.
It has two spidery copper bars attached to it. These bars conduct the heat away from the chips on the motherboard and are then cooled by the fan. Make a note of which way the small power connector is inserted into it's socket on the motherboard then remove it.
The fan is attached to the heat sink so it all needs to come out. There are six screws. One holding the fan in place and the other five clamping the heat sink to the chips that get hot. The screw holding the fan in place is located towards the edge of the case and is indicated by an arrowhead on the circuit board legend.
Remove this screw completely before moving on to the heat sink clamps which require a little more care in dismantling and putting back together again. Notice that the screws holding the heat sinks in place are numbered.
Do not ignore these numbers because they are there to ensure that the heat sink is clamped properly to the motherboard to make a good even thermal contact with the chip casings. This is important because if the heat sink does not make a good thermal contact with the chips then heat will not be dissipated by the fan, the chips will overheat and damage may result.
You don't want this to happen, trust me. Begin by unscrewing screw number '1' then proceed to unscrew the other four screws in numerical order. When you replace the heat sink you should screw it down in the reverse order. The screws are spring loaded and retained in the holes of the heat sink so they can't fall out. Now that all the screws are out you can gently remove the whole fan and heat sink assembly from the motherboard. If you encounter resistance then stop pulling. One or more of the screws may not be completely free of it's threads.
The image below shows the fan and heat sink out of the case and the shiny tops of the two heat generating chips exposed on the motherboard. When you remove the assembly you will see that the chips and the heat sink are caked with heat sink compound. This substance helps to conduct the heat from the surface of the chips to the heat sink and should be cleaned off with isopropyl alcohol then replaced with fresh before reassembly.
You now need to remove the old fan, clean up the radiator part of the heat sink and replace it with the new one. The fan is fixed to the heat sink with an adhesive backed tape which is very sticky. Carefully lift the tape from the fan only. Try not to damage the tape because you can use it to fix the new fan in place.
Using an air-duster or can of compressed air, carefully blow the dust away from the vanes of the radiator. Soak the tip of a cotton bud in Isopropyl alcohol then use it to remove all of the old heat sink compound from both of the copper surfaces on the underside of the heat sink.
When the alcohol has dried off and there is no trace of the old heat sink compound you can squeeze a little compound from your new tube onto all four surfaces on the heat sink and the tops of the chips. You should aim to completely cover the surfaces with compound without applying more than needed to do so. This guide does not have a proper prerequisite guide. Help match it to its ideal partner by finding it or writing one! The steps in this guide should be split up and made into a series of prerequisite guides.
Remove all charge from the laptop by holding down the power button for at least 5 seconds. Use a Phillips 00 screwdriver to remove the two 7. Push the hard drive to the left using the plastic tab to disconnect it from the laptop.
To prevent damage of the connection on the hard disk drive or the laptop, perform this task slowly and with care. If you need to remove the bracket from the hard drive, follow the next few steps:.
Remove the two 3. When installing RAM, make sure sticks are firmly in place or the computer will not register them. Remove the following 16 screws securing the back cover using a Phillips 00 screwdriver:. Using both hands, separate the back cover by lifting from the back and working around the perimeter to release tabs.
Remove the two 5. Remove the wired connection between the fan and the copper wire using metal tweezers. Do not to pull on the wires directly or it will damage the connection between the fan and the laptop. Remove the four 5. Position thumbs and index fingers close to processor and lift up on the copper wire, while applying slight downward pressure on the motherboard with remaining fingers. If there is thermal paste between the processor and the fan attachment, increased force will be required to detach the fan.
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