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Compaq Deskpro 2000 Compaq Deskpro 2000 Series of Personal Computers Pentium P - Page 140

System Board, Remove the front bezel - cmos battery

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5.19 System Board To remove the system board, complete the following steps: 1. Remove the system unit cover (Section 5.6). 2. Remove the expansion boards (Section 5-8). 3. Remove the riser board (Section 5.10). It is not necessary to remove the riser brace in order to remove the system board. If a replacement external battery is installed on the system board, do not unplug the battery from the system board connector as that will erase the CMOS. Remove the external battery from the hook-and-loop fastener on the chassis but leave it electrically connected to the system board. 4. Disconnect any cables plugged into the system board. 5. Remove the front bezel (section 5.14.1). 6. Remove the drive cage (Section 5.17). 7. Remove the screws securing the system board to the chassis. t Five screws secure Pentium system board. t Seven screws secure Pentium II system board. 5-40 Removal and Replacement Procedures - Desktop

Section	Page
NOTICE	3
CONTENTS	5
PRODUCT DESCRIPTION	13
1.1 Compaq Deskpro 2000 Series of Personal Computer Models	14
1.2 Features	15
1.3 System Design	17
1.4 Desktop Computer Features	26
1.5 Minitower Computer Features	29
1.6 Enhanced Keyboard	34
1.7 Options	36
COMPAQ UTILITIES	39
2.1 Getting Ready	39
2.2 Computer Setup	41
2.3 Computer Checkup (TEST)	48
2.4 View System Information (INSPECT)	49
2.5 Create a Diagnostics Diskette	50
2.6 Managing the Diagnostics Partition	50
2.7 Exiting the Compaq Utilities Menu	51
2.8 Compaq Enhanced Insight Personal Edition (Diagnostics for Windows)	51
2.9 Power-On Self-Test (POST)	51
2.10 ROMPaq	52
2.11 Compaq Intelligent Manageability	53
ILLUSTRATED PARTS CATALOG	66
3.1 System Unit	67
3.2 Mass Storage Devices	71
3.3 Cables	73
3.4 Standard and Optional Boards	75
3.5 Keyboards	79
3.6 Monitors	81
3.7 Miscellaneous Hardware Kit	84
3.8 Miscellaneous Plastics Kit	85
3.9 Miscellaneous Parts	87
3.10 Shipping Boxes	89
REMOVAL AND REPLACEMENT PRELIMINARIES	94
4.1 Electrostatic Discharge Information	94
4.2 Routine Care	97
4.3 Service Considerations	99
REMOVAL AND REPLACEMENT PROCEDURES - DESKTOP	101
5.1 Serial Number	101
5.2 Disassembly Sequence Chart	102
5.3 Preparation for Disassembly	103
5.4 Feet	104
5.5 Cable Lock	105
5.6 System Unit Cover	106
5.7 Speaker	107
5.8 Expansion Board	109
5.9 System Board Components	112
5.10 Riser Board	118
5.11 Riser Brace	119
5.12 Expansion Board Guide	120
5.13 Replacement Battery	121
5.14 Front Bezel Assembly	123
5.15 Power Supply Assembly	127
5.16 Mass Storage Devices	130
5.17 Drive Cage	137
5.18 LED Cable	138
5.19 System Board	140
REMOVAL AND REPLACEMENT PROCEDURES - MINITOWER	143
6.1 Serial Number	143
6.2 Disassembly Sequence Chart	144
6.3 Preparation for Disassembly	145
6.4 Feet	145
6.5 Cable Lock	146
6.6 Exposing the Chassis	147
6.7 Riser Brace	149
6.8 Expansion Board	150
6.9 Expansion Board Guide	152
6.10 Riser Board	153
6.11 Speaker	154
6.12 System Board Components	155
6.13 System Board	161
6.14 Replacement Battery	164
6.15 ISA Option Board Retainer	166
6.16 Front Bezel Assembly	167
6.17 Power Supply Assembly	171
6.18 LED Cable	174
6.19 Mass Storage Devices	176
JUMPER AND SWITCH INFORMATION	184
7.1 System Board Switches	185
7.2 System Board Jumpers	189
7.3 Hard Drives	193
7.4 CD-ROM Drive Jumper Settings	201
7.5 Optional PD-CD Drives	201
7.6 Diskette Drive	202
SPECIFICATIONS	203
8.1 System	203
8.2 Drives	209
8.3 Audio System	216
8.4 Keyboard	216
8.5 Mouse	217
8.6 Supported Graphics Resolutions	217
CONNECTOR PIN ASSIGNMENTS	219
POWER CORD SET REQUIREMENTS	225
HARD DRIVES	227
DIAGNOSTIC ERROR CODES	232
POST ERROR MESSAGES	243
TROUBLESHOOTING WITHOUT DIAGNOSTICS	246
INTEL 440LX CHIPSET MEMORY LIMITATIONS	258