HP Pavilion dm1-3100 HP Pavilion dm1 Notebook PC - Maintenance and Service Gui - Page 65
System board, When replacing the system board
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System board Description System board: ● E350 system board with WWAN ● E350 system board Spare part number 635314-001 639297-001 Before removing the system board, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation mode, turn on the computer, and then shut it down using the operating system. 2. Disconnect all of the external devices that are connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 32). 5. Remove the following components: a. Service cover (see Hard drive / Solid state drive on page 33). b. Hard drive (see Hard drive / Solid state drive on page 33). c. Keyboard (see Keyboard on page 43). d. Top cover (see Top cover on page 46). e. Display assembly (see Display assembly on page 52). When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board: ● RTC battery (see RTC battery on page 59). ● Heat sink (see Heat sink assembly on page 60). Remove the system board: To remove the system board, follow these steps: 1. Disconnect the fan cable (1) from the system board. ENWW Component replacement procedures 57