How to Clean the Dust from Your Pavilion G7 2320dx

The Pavilion g7 2320dx fan seems to blow more and more often, maybe even constantly. It's cool to think there's spyware using all the CPU cycles, but probably there's just dust in the heat exchanger. This is an EXPERT level project.


  1. 1
    Obtain the service manual from the HP web site, see "Sources and Citations".
  2. 2
    Flip to the section titled "System board" on page 68. You'll have to get this far down into the computer, essentially fully disassembled, to get to the fan and heat exchanger.
  3. 3
    Follow the instructions carefully and remove the items accordingly until you have removed the system board.
  4. 4
    This particular laptop uses a fan to blow cooler air across a heat exchanger to get rid of the heat which comes through a cold finger from the processing elements. Simply blow canned air backwards through this heat exchanger, toward the fan, to free the dust. Blow the fan as well with air, and blow backwards through the inlet vent holes on the bottom case cover. Although using air without dis-assembly may work, doing this may blow the dust into other components such as the speaker which is right next to the fan.
  5. 5
    Reassemble the laptop.
  6. 6
    Recharge the laptop. Since the CMOS was cleared, the system will not start until it thinks it has been recharged. Be patient and wait a couple of hours before trying to start it.
  7. 7
    Reconfigure the BIOS if you had changed it for Linux or another OS. Do this by pressing F10 just after turning it on. Set the hardware date and time so that there are no conflicts during booting with dates found on the disk.
  8. 8
    Restart the computer.


  • All the screws are the same (2.5x6) except the one holding the WLAN board (2.5x3).
  • Learn to work with ZIF sockets before attempting this dis-assembly and cleaning.


  • Always remain grounded, that is, in close contact with the computer case or electrically connected to it. Otherwise you can destroy the sensitive MOS devices.
  • Always handle electronics the least you can. The more you handle them, the more the acid on your skin can oxidize metals and the more likely you can discharge a spark, unnoticeable to you, but large enough to damage devices.
  • Parts are tiny so work without distractions and keep small children away.

Things You'll Need

  • The service manual from HP, see "Sources and Citations".
  • Size 0 and size 1 Phillips head (crosshead) screwdrivers. Yes, I recommend using magnetized ones, since the screws are exceptionally small. Contrary to opinions voiced elsewhere, magnetized screwdrivers do not cause sparks. Moreover, your disk drive is sufficiently shielded from weak external magnetic fields.
  • Can of compressed air or difluoroethane. Do not use air from an air compressor since it can contain moisture.

Article Info

Categories: Hardware Maintenance and Repair