HP 421 Compaq 320, 321, 420, 421, 620 and 621 Notebook PCs HP 420 and 620 Not - Page 110
RTC battery, Remove the palm rest see
View all HP 421 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 110 highlights
RTC battery The spare part number for the RTC battery is 449137-001. Before removing the RTC battery, 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). Remove the RTC battery: 1. Position the computer right-side up with the front toward you. 102 Chapter 4 Removal and replacement procedures