Rtc Battery; I/O Board - HP EliteBook 645 G9 Maintenance And Service Manual

RTC battery

To remove the RTC battery, use this procedure and illustration.
Table 6-2 RTC battery description and part number
Description
RTC battery
Before removing the RTC battery, follow these steps:
1. Prepare the computer for disassembly (see
2. Remove the bottom cover (see
3. Disconnect the battery cable from the system board (see
Remove the RTC battery:
1. Disconnect the battery cable from the system board (1).
2. Remove the cable from the clips on the computer chassis (2).
3. Use a tool to release the battery from the computer (3). The battery is secured with adhesive.
Reverse this procedure to install the RTC battery.

I/O board

To remove the I/O board, use this procedure and illustration.
Table 6-3 I/O board description and part number
Description
I/O board
Preparation for disassembly on page
Bottom cover on page 39).
39).
Battery on page 49).
Component replacement procedures
Spare part number
M34737-001
Spare part number
M21399-001
51