Compaq XL280 - Manual (Page 109)

40 R EMOVAL & R EPLACEMENT P RESARIO N OTEBOOK M AINTENANCE AND S ERVICE G UIDE 1800 S ERIES
Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Real Time Clock (RTC) Battery
Ä CAUTION: 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.