Clean the Cooling Fan in Dell Latitude D600 Laptop PC If your laptop runs slowly, or shuts down on its own without any warning, most likely it happens because of overheating. The overheating is usually caused by dirty fan or dust-clogged heat sink. This article will show you how to remove and clean the cooling fan and heat sink in a Dell Latitude D600 laptop. Steps 1. 1 Remove the battery. Remove the battery. 2. 2 Remove the CD-ROM Remove the CD-ROM. 3. 3 Remove 9 marked screws Remove 9 marked screws. 4. 4 Remove the switch cover Lift up the switch cover with a flat screw driver, and continue to remove the switch cover with your fingers. 5. 5 Remove 2 marked screws Remove 2 marked screws. 6. 6 Remove the keyboard Lift up the keyboard, and disconnect the keyboard cable from the motherboard. 7. 7 Remove LCD cable Remove the 3 red-marked screws, and remove the yellow-marked screw and disconnect the LCD cable from the motherboard, then remove the whole LCD assembly. 8. 8 Remove the 3 red-marked screws, then disconnect the yellow-marked touch pad cable from the motherboard. Remove the 3 red-marked screws, then disconnect the yellow-marked touch pad cable from the motherboard. 9. 9 Remove the top cover Remove the top cover. 10. 10 Loosen 4 marked screws Loosen the 4 marked screws with the sequence from 1 to 4. 11. 11 Remove the heat sink Lift up and remove the heat sink. 12. 12 Disconnect fan cable Remove the 2 red-marked screws, then disconnect the yellow-marked fan cable from the motherboard. 13. 13 Remove the fan Lift up and remove the fan. 14. 14 Clean using compressed air Clean the area using compressed air. 15. 15 Clean the fan Clean the heat sink Clean the fan and the heat sink using Q-tips and compressed air. 16. 16 Re-assemble the laptop with reversed sequence from step 1 to 13.