2. Remove the heat sink (2).
3. Thoroughly clean the thermal material from the surfaces of the heat sink and the system board
components each time the heat sink is removed. Replacement thermal material is included with
the heat sink and system board spare part kits. The following illustration shows the replacement
thermal material locations.
Thermal pads (1) and thermal paste (2) is used on the bottom of the heat sink.
To replace the heat sink, reverse the removal procedures.
RTC battery
To remove the RTC battery, use this procedure and illustration.
Table 6-9
RTC battery description and part number
Description Spare part number
RTC battery N19214-001
Before removing the RTC battery, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 41).
2. Remove the service cover (see Service cover on page 41), and then remove the following
components:
a. Battery (see Battery on page 42)
b. WWAN module thermal module (see WWAN module on page 45)
70
Chapter 6 Removal and replacement procedures for authorized service provider parts
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