Compaq Deskpro 4000S and 4000N Personal Computers
5-23
5.14 Replacement Battery
The real-time clock battery that came with the computer is nonreplaceable and is permanently
installed on the system board.
!
WARNING:
The system board contains a clock/CMOS lithium battery. The lithium battery may explode if
mistreated. The battery is soldered into place and may not be removed. Do not abuse or disassemble. Use
only replacement batteries supplied by Compaq Computer Corporation.
✎
It is important to make a set of backup diagnostic diskettes before you install a new battery.
To install the external real-time battery, complete the following steps:
1. Prepare the computer for disassembly (Section 5.4).
2. Remove the system unit cover (Section 5.7).
3. Raise the drive cage to its upright position.
4. Connect the new battery to pins 9 and 12 on the P14 battery header connector. When this battery
is connected, the internal battery is automatically disconnected.
The battery connector is keyed for proper installation.
Summary of Contents for Deskpro 4000N - Desktop PC
Page 1: ...MAINTENANCE SERVICE GUIDE Compaq Deskpro 4000N and 4000S Network Personal Computers...
Page 2: ......
Page 4: ...CPS...
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Page 46: ...3 2 Illustrated Parts Catalog 3 1 System Unit Figure 3 2 System Unit Spares...
Page 48: ...3 4 Illustrated Parts Catalog 3 2 Parts Kits Figure 3 3 Part Kits Components...
Page 50: ...3 6 Illustrated Parts Catalog 3 3 Miscellaneous Parts Figure 3 4 Miscellaneous Parts...
Page 52: ...3 8 Illustrated Parts Catalog 3 4 Mass Storage Devices Figure 3 5 Mass Storage Devices...
Page 54: ...3 10 Illustrated Parts Catalog 3 5 Cables Figure 3 6 Cables...
Page 58: ...3 14 Illustrated Parts Catalog 3 7 Keyboards Figure 3 8 Enhanced Keyboard...
Page 60: ...3 16 Illustrated Parts Catalog 3 8 Monitors Figure 3 9 Compaq Monitors...
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Page 124: ...6 10 Connector Jumper and Switch Information...
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