HP EliteBook 645 - System board

3. Be sure to install thermal material onto the heat sink in the location shown in the following
illustration.
To install the heat sink, reverse this procedure.
System board
To remove the system board, use these procedures and illustrations.
Table 8-10
System board descriptions and part numbers
Description Spare part number
System board (includes integrated processor)
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating systems
xxxxxx-601: Windows operating system
AMD Ryzen 7 7735U processor N95973-xx1
AMD Ryzen 7 7735U processor and WWAN N95972-xx1
AMD Ryzen 5 7535U processor N95969-xx1
AMD Ryzen 5 7535U processor and WWAN N95968-xx1
AMD Ryzen 3 7335U processor N95967-xx1
AMD Ryzen 3 7335U processor and WWAN N95966-xx1
AMD Ryzen 7 PRO 7735U processor and WWAN N95974-xx1
AMD Ryzen 5 PRO 7535U processor N95971-xx1
AMD Ryzen 5 PRO 7535U processor and WWAN N95970-xx1
AMD Ryzen 3 PRO 7335U processor N95965-xx1
AMD Ryzen 3 PRO 7335U processor and WWAN N95964-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 62).
System board
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