HP ProBook 635 Maintenance and Service Guide - Page 61

WLAN module see, Memory modules see

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Table 6-12 System board descriptions and part numbers Description System board (includes processor): All system boards use the following part numbers: xxxxxx-001: Non-Windows operating system xxxxxx-601: Windows 10 operating system AMD Ryzen 7 PRO 4750U AMD Ryzen 7 PRO 4750U (WWAN models) AMD Ryzen 7 4700U AMD Ryzen 7 4700U (WWAN) AMD Ryzen 5 PRO 4650U AMD Ryzen 5 PRO 4650U (WWAN models) AMD Ryzen 5 4500U AMD Ryzen 5 4500U (WWAN) AMD Ryzen 3 4300U AMD Ryzen 3 4300U (WWAN models) Spare part number M30644-xx1 M30645-xx1 M30640-xx1 M30641-xx1 M30642-xx1 M30643-xx1 M30638-xx1 M30639-xx1 M30636-xx1 M30637-xx1 Before removing the system board, follow these steps: 1. Prepare the computer for disassembly (Preparation for disassembly on page 31). 2. Remove the bottom cover (Bottom cover on page 31). 3. Remove the battery (see Battery on page 38). 4. Remove the fan (see Fan on page 48). When you replace the system board, be sure to remove the following components (as applicable) from the defective system board and install them on the replacement system board: ● Memory modules (see Memory modules on page 32). ● WLAN module (see WLAN module on page 39). ● WWAN module (see WWAN module on page 41). ● Solid-state drive (see Solid-state drive on page 35). ● Heat sink (see Heat sink on page 49). Remove the system board: 1. Disconnect the following cables from the system board: ● Power connector cable (1) ● Camera cable (2) ● Antenna cables from the WWAN module (select products only) (3) ● Larger USB cable from the USB board (ZIF) (4) Component replacement procedures 51

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Table 6-12
System board descriptions and part numbers
Description
Spare part
number
System board
(includes processor):
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating system
xxxxxx-601: Windows 10 operating system
AMD Ryzen 7 PRO 4750U
M30644-xx1
AMD Ryzen 7 PRO 4750U (WWAN models)
M30645-xx1
AMD Ryzen 7 4700U
M30640-xx1
AMD Ryzen 7 4700U (WWAN)
M30641-xx1
AMD Ryzen 5 PRO 4650U
M30642-xx1
AMD Ryzen 5 PRO 4650U (WWAN models)
M30643-xx1
AMD Ryzen 5 4500U
M30638-xx1
AMD Ryzen 5 4500U (WWAN)
M30639-xx1
AMD Ryzen 3 4300U
M30636-xx1
AMD Ryzen 3 4300U (WWAN models)
M30637-xx1
Before removing the system board, follow these steps:
1.
Prepare the computer for disassembly (
Preparation for disassembly
on page
31
).
2.
Remove the bottom cover (
Bottom cover
on page
31
).
3.
Remove the battery (see
Battery
on page
38
).
4.
Remove the fan (see
Fan
on page
48
).
When you replace the system board, be sure to remove the following components (as applicable) from the
defective system board and install them on the replacement system board:
●
Memory modules (see
Memory modules
on page
32
).
●
WLAN module (see
WLAN module
on page
39
).
●
WWAN module (see
WWAN module
on page
41
).
●
Solid-state drive (see
Solid-state drive
on page
35
).
●
Heat sink (see
Heat sink
on page
49
).
Remove the system board:
1.
Disconnect the following cables from the system board:
●
Power connector cable
(1)
●
Camera cable
(2)
●
Antenna cables from the WWAN module (select products only)
(3)
●
Larger USB cable from the USB board (ZIF)
(4)
Component replacement procedures
51