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Compaq 470007-802 Deskpro EN Series of Personal Computers - Slim Desktop Model - Page 71

Disabling or Clearing the Power-On and Setup Passwords, Reconnect the external equipment.

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5.1.3 Disabling or Clearing the Power-On and Setup Passwords 1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet. 2. Disconnect the keyboard, monitor, and any other external devices connected to the computer. 3. Remove the access panel. 4. Locate the header and jumper labeled E49. 5. Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to avoid losing it. 6. Replace the access panel. 7. Reconnect the external equipment. 8. Plug in the computer and turn on power. Allow the operating system to start. This clears the current passwords and disables the password features. 9. To re-enable the password features, repeat steps 1-4, then replace the jumper on pins 1 and 2. 10. Repeat steps 6-8, then establish new passwords. Refer to the Computer Setup (F10 Setup) instructions to establish new passwords. Compaq Deskpro EN Series of Personal Computers 5-3

Section	Page
Maintenance & Service Guide	1
Addendum #1 to Deskpro EN Maintenance & Service Guide	2
Notice	7
CONTENTS	8
ABOUT THIS GUIDE	11
Symbols and Conventions	11
Technician Notes	11
Locating Additional Information	12
PRODUCT DESCRIPTION	13
1.1 Product Features	14
1.2 Serial Number Location	17
1.3 Locating Additional Information	18
SPARE PARTS	19
2.1 System Unit	19
2.2 Mass Storage Devices	20
2.3 Cables	21
2.4 Standard, Memory, and Expansion Boards	22
2.5 Keyboards	23
2.6 Miscellaneous Screw Kit	24
2.7 Miscellaneous Plastics Kit	25
2.8 Miscellaneous Parts	26
2.9 Shipping Boxes	27
2.10 Documentation and Software	27
REMOVAL & REPLACEMENT PRELIMINARIES	28
3.1 Electrostatic Discharge Information	28
3.2 Routine Care	30
3.3 Service Considerations	32
REMOVAL & REPLACEMENT PROCEDURES	34
4.1 Disassembly Sequence Chart	35
4.2 Preparation for Disassembly	36
4.3 Unlocking the Smart Cover Lock	37
4.4 Computer Feet	39
4.5 Cable Lock Installation	40
4.6 Access Panel	41
4.7 Front Bezel	42
4.8 Front Panel Trim	43
4.9 Removing a Blank Drive Bezel	44
4.10 Installing Additional Memory	45
4.11 Expansion Cards	47
4.12 Graphics Cards	49
4.13 5.25-Inch Drives	56
4.14 Rotating the Drive Cage	57
4.15 Drives	58
4.16 System Board	61
4.17 Battery	62
4.18 Power Button/LED Board	63
4.19 Hood Sensor	64
4.20 Processor Assembly	65
4.21 Speaker	66
4.22 Power Supply	67
4.23 Chassis Fan Assembly	68
CONNECTORS AND JUMPERS	69
5.1 System Board	69
5.2 Hard Drive Jumper Settings	73
SPECIFICATIONS	75
6.1 System	75
6.2 Drives	80
6.3 Compaq Keyboards	83
6.4 Compaq Scroll Mouse	83
6.5 Supported Graphics Resolutions	84

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Compaq Deskpro EN Series of Personal Computers

5-3

5.1.3

Disabling or Clearing the Power-On and Setup Passwords

Turn off the computer and any external devices, and disconnect the power cord from

the power outlet.

Disconnect the keyboard, monitor, and any other external devices connected to the

computer.

Remove the access panel.

Locate the header and jumper labeled E49.

Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to

avoid losing it.

Replace the access panel.

Reconnect the external equipment.

Plug in the computer and turn on power. Allow the operating system to start. This clears

the current passwords and disables the password features.

To re-enable the password features, repeat steps 1-4, then replace the jumper on pins 1

and 2.

10.

Repeat steps 6-8, then establish new passwords.

Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.