HP 421 Compaq 320, 321, 420, 421, 620 and 621 Notebook PCs HP 420 and 620 Not - Page 108
Main battery connector, Remove the fan see
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7. Slide the system board (5) out of the base enclosure. Reverse this procedure to install the system board. Main battery connector The main battery cable is included in Cable Kit 605795-001. Before removing the main battery cable, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices 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 53). 5. Remove the service door (see Service door on page 53). 6. Remove the hard drive (see Hard drive on page 56). 7. Remove the optical drive (see Optical drive on page 62). 8. Remove the fan (see Fan on page 64). 9. Remove the palm rest (see Palm rest on page 68). 10. Remove the keyboard (see Keyboard on page 73). 11. Remove the top cover (see Top cover on page 77). 12. Remove the system board (seeSystem board on page 96). 100 Chapter 4 Removal and replacement procedures