HP 18XL381 manual Real Time Clock RTC Battery

Presario 1800/1800T Series

Models: XL280, XL380, XL381,

and XL390

Real Time Clock (RTC) Battery

ÄCAUTION: Removing the RTC battery clears the power-on password and removes all setup attributes that are programmed in the CMOS.

To remove the RTC battery, complete the following steps:

1.Prepare the Notebook for disassembly (pg 10).

2.Remove the Palmrest cover with TouchPad (pg 13).

3.Remove the keyboard (pg 16).

4.Remove the heat sink (pg 23).

5.Remove the button board cover (pg 17).

6.Remove the Internet switch board (pg 21).

7.Remove the display panel assembly (pg 34).

8.Remove the hard drive (pg 25).

9.Remove the upper CPU cover (pg 37).

Continued on the next page.

40 REMOVAL & REPLACEMENT PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1800 SERIES