Dell Latitude 5420 Rugged Service Manual

Removing the Heatsink assembly

1. Follow the procedure in Before working inside your computer.
2. Remove the:
   1. Batteries
   2. Bottom chassis cover
   3. WLAN card
   4. WWAN card
   5. PCIe Heatsink fan assembly
   6. Docking port assembly
3. NOTE Depending on the order configuration details the system may have either of the heatsink assembly.

   DSC Heatsink assembly

   Unroute the antennae cables from the tabs on the heatsink pipe.
   
4. Remove the five 'M2.5*5' screws [1] and two 'M1.6*5' [2] screw from the thermal module.
5. Lift and the heat sink assembly from the computer [3].
   
   NOTE Discreet and UMA bases have different types of heatsink assembly.