Disassembly and Reassembly 4-25
Replacing the Real-time Clock Battery
You may need to replace the real-time clock (RTC) battery because of its
battery life span. The battery powers the clock in the absence of power. When
the battery starts to weaken, it loses voltage, and the system settings stored in
CMOS RAM (for example, the date and time) may be wrong.
The battery (Vendor Part No. CR2450) is available through many vendors. It is
located on your system board (see Figure 4-20). Notice the plus (+) sign on the
battery. The sign assists in correctly positioning the battery on the system board.
Contact your sales representative or dealer for a list of approved devices.
Figure 4-20. Location of the Real-Time Clock Battery
!
CAUTION
Danger of explosion if the battery is incorrectly replaced.
Replace only with same or equivalent type recommended by
manufacturer. Dispose of lithium batteries as required by
local ordinance or as normal waste if no local ordinance
exists. Do not expose the component to excessive heat or
fire. Keep all batteries away from children.
Summary of Contents for Express5800/140Hb
Page 1: ... S e r v i c e G u i d e EXPRESS5800 140Hb ...
Page 2: ......
Page 3: ... S e r v i c e G u i d e EXPRESS5800 140Hb ...
Page 10: ...viii Contents ...
Page 18: ...xvi Using This Guide ...
Page 48: ...1 30 System Overview ...
Page 64: ...2 16 Setting Up the System Figure 2 10 Connecting the AC Power Cord to the Server ...
Page 98: ...3 28 Configuring Your System ...
Page 101: ......
Page 176: ...4 76 Disassembly and Reassembly ...
Page 200: ...5 24 Problem Solving ...
Page 201: ...6 Illustrated Parts Breakdown Exploded View Field Replaceable Units ...
Page 211: ...A Technical Specifications Server Unit ...
Page 214: ...A 4 Technical Specifications ...
Page 220: ...B 6 Interrupt Request PCI IRQ Device I O Port Address Assignments ...
Page 231: ...D ROMPilot BIOS Error Codes ROMPilot BIOS Error Codes ...
Page 234: ...D 4 ROMPilot BIOS Error Codes ...
Page 235: ...E Connectors Overview External Device Connector Pin Information ...
Page 250: ...10 Glossary ...
Page 256: ...Index 4 ...
Page 257: ...xx ...
Page 258: ... 456 01547 000 ...