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Clearing and Resetting the CMOS

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4. Locate the header and jumper labeled CLR_PASS. NOTE: The password jumper is blue so that it can be easily identified. For assistance locating the password jumper and other system board components, see the Illustrated Parts & Service Map (IPSM). The IPSM can be downloaded from http://www.hp.com/support. 5. Remove the jumper from pins 2 and 3. 6. Place the jumper on pins 1 or 2. 7. Put the jumper back on pins 2 or 3. 8. Replace the access panel. 9. Reconnect the external equipment. 10. Plug in the computer and turn on power. Allow the operating system to start. This clears the current passwords and disables the password features. 11. To establish new passwords, use Computer Setup. Clearing and Resetting the CMOS The computer's configuration memory (CMOS) stores information about the computer's configuration. The CMOS button resets CMOS but does not clear the power-on and setup passwords. Clearing CMOS will clear the Active Management Technology (AMT) settings in the Management Engine BIOS Extension (MEBx), including the password. The password will default to "admin" and will need to be reset. The AMT settings will also need to be reset. To access the MEBx, press Ctrl+P during POST. 1. Shut down the operating system properly, then turn off the computer and any external devices, and disconnect the power cord from the power outlet. 2. With the power cord disconnected, press the power button again to drain the system of any residual power. WARNING! To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet, and allow the internal system components to cool before touching. CAUTION: When the computer is plugged in, the power supply always has voltage applied to the system board even when the unit is turned off. Failure to disconnect the power cord can result in damage to the system. Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See the Safety & Regulatory Information guide for more information. 3. Remove the access panel. 4. Locate the header and jumper labeled CLR_CMOS NOTE: The password jumper is blue so that it can be easily identified. For assistance locating the password jumper and other system board components, see the Illustrated Parts & Service Map (IPSM). The IPSM can be downloaded from http://www.hp.com/support. 5. Remove the jumper from pins 2 and 3. 6. Place the jumper on pins 1 or 2. Clearing and Resetting the CMOS 187

Section	Page
Product Features	11
Identifying the Chassis	11
Serviceability Features	11
Feature Overview	12
Microtower Components	13
Small Form Factor Components	14
Installing and Customizing the Software	15
Installing the Operating System	15
Downloading Microsoft Windows Updates	15
Installing or Upgrading Device Drivers (Windows systems)	16
Accessing Disk Image (ISO) Files	16
Protecting the Software	16
Computer Setup (F10) Utility	17
Computer Setup (F10) Utilities	17
Using Computer Setup (F10) Utilities	18
Computer Setup—File	18
Computer Setup—Storage	20
Computer Setup—Security	22
Computer Setup—Power	25
Computer Setup—Advanced	26
Recovering the Configuration Settings	27
Illustrated parts catalog	28
Microtower (MT) Chassis Spare Parts	28
Computer Major Components	28
Cables	30
Misc Parts	31
Drives	32
Misc Boards	32
Sequential Part Number Listing	32
Small Form Factor (SFF) Chassis Spare Parts	35
Computer major components	35
Cables	37
Misc Parts	38
Drives	38
Misc Boards	39
Sequential Part Number Listing	39
Serial ATA (SATA) Drive Guidelines and Features	42
SATA Hard Drives	42
SATA Hard Drive Cables	42
SATA Data Cable	42
SMART ATA Drives	43
Hard Drive Capacities	43
Routine Care and Disassembly Preparation	44
Electrostatic Discharge Information	44
Generating Static	44
Preventing Electrostatic Damage to Equipment	45
Personal Grounding Methods and Equipment	46
Grounding the Work Area	46
Recommended Materials and Equipment	46
Operating Guidelines	47
Routine Care	48
General Cleaning Safety Precautions	48
Cleaning the Computer Case	48
Cleaning the Keyboard	48
Cleaning the Monitor	49
Cleaning the Mouse	49
Service Considerations	49
Power Supply Fan	49
Tools and Software Requirements	49
Screws	50
Cables and Connectors	50
Hard Drives	50
Lithium Coin Cell Battery	50
Removal and Replacement Procedures – Microtower (MT) Chassis	52
Preparation for Disassembly	52
Access Panel	53
Front Bezel	55
Memory	57
DDR3-SDRAM DIMMs	57
Populating DIMM Sockets	58
Removing Memory Modules	59
Expansion Cards	61
Cable Management	67
Cable Connections	68
Drives	69
Drive Positions	70
Installing Additional Drives	71
System Board Drive Connections	72
Removing an Optical Drive	73
Removing a Hard Drive	76
Front I/O and USB Panel Housing Assembly	83
Power Switch/LED Assembly	85
System Fan	87
Speaker	89
Fan Sink Assembly	90
Processor	92
Power Supply	95
System Board	97
Battery	98
Removal and Replacement Procedures – Small Form Factor (SFF) Chassis	100
Preparation for Disassembly	100
Access Panel	100
Front Bezel	102
Memory	103
DDR3-SDRAM DIMMs	103
Populating DIMM Sockets	104
Removing DIMMs	105
Expansion Card	108
Cable Management	112
Cable Connections	113
Drives	114
Drive Positions	114
Removing Drives	115
Removing an Optical Drive	115
Removing the Hard Drive	117
Power Switch	120
Front USB Assembly	122
Speaker	125
Fan Assembly	126
Fan Sink	129
Processor	131
Power Supply	133
System Board	136
Battery	137
Connector Pin Assignments	139
Ethernet BNC	139
USB	139
Microphone	139
Headphone	139
Line-in Audio	140
Line-out Audio	140
4-Pin Power (for CPU)	140
Monitor	141
Serial Interface, Powered and Non-Powered	141
DVI Connector	142
24-Pin Power	143
PCI Express	144
PCI Express	145
Power Cord Set Requirements	146
General Requirements	146
Japanese Power Cord Requirements	146
Country-Specific Requirements	147
POST Error Messages	148
POST Numeric Codes and Text Messages	148
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes	156
Troubleshooting Without Diagnostics	160
Safety and Comfort	160
Before You Call for Technical Support	160
Helpful Hints	161
Solving General Problems	162
Solving Power Problems	165
Solving Diskette Problems	166
Solving Hard Drive Problems	169
Solving Media Card Reader Problems	172
Solving Display Problems	173
Solving Audio Problems	177
Solving Printer Problems	179
Solving Keyboard and Mouse Problems	180
Solving Hardware Installation Problems	181
Solving Network Problems	183
Solving Memory Problems	187
Solving Processor Problems	188
Solving CD-ROM and DVD Problems	189
Solving USB Flash Drive Problems	191
Solving Front Panel Component Problems	191
Solving Internet Access Problems	192
Solving Software Problems	195
Contacting Customer Support	195
Password Security and Resetting CMOS	196
Resetting the Password Jumper	196
Clearing and Resetting the CMOS	197
Backup and Recovery	199
Windows 7 – Backup and Recovery	199
Backing Up Your Information	199
Performing a Recovery	200
Using the Windows Recovery Tools	201
Using F11	201
Using a Windows 7 Operating System DVD (purchased separately)	202
Specifications	203
MT Specifications	203
SFF Specifications	204

Match case Limit results 1 per page

Locate the header and jumper labeled CLR_PASS.

NOTE:

The password jumper is blue so that it can be easily identified. For assistance locating

the password jumper and other system board components, see the Illustrated Parts & Service

Map (IPSM). The IPSM can be downloaded from

http://www.hp.com/

support

Remove the jumper from pins 2 and 3.

Place the jumper on pins 1 or 2.

Put the jumper back on pins 2 or 3.

Replace the access panel.

Reconnect the external equipment.

10.

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

current passwords and disables the password features.

11.

To establish new passwords, use Computer Setup.

Clearing and Resetting the CMOS

The computer’s configuration memory (CMOS) stores information about the computer’s configuration.

The CMOS button resets CMOS but does not clear the power-on and setup passwords.

Clearing CMOS will clear the Active Management Technology (AMT) settings in the Management

Engine BIOS Extension (MEBx), including the password. The password will default to “admin” and will

need to be reset. The AMT settings will also need to be reset. To access the MEBx, press

Ctrl

during POST.

Shut down the operating system properly, then turn off the computer and any external devices,

and disconnect the power cord from the power outlet.

With the power cord disconnected, press the power button again to drain the system of any

residual power.

WARNING!

To reduce the risk of personal injury from electrical shock and/or hot surfaces, be

sure to disconnect the power cord from the wall outlet, and allow the internal system

components to cool before touching.

CAUTION:

When the computer is plugged in, the power supply always has voltage applied to

the system board even when the unit is turned off. Failure to disconnect the power cord can

result in damage to the system.

Static electricity can damage the electronic components of the computer or optional equipment.

Before beginning these procedures, ensure that you are discharged of static electricity by briefly

touching a grounded metal object. See the

Safety & Regulatory Information

guide for more

information.

Remove the access panel.

Locate the header and jumper labeled CLR_CMOS

NOTE:

The password jumper is blue so that it can be easily identified. For assistance locating

the password jumper and other system board components, see the Illustrated Parts & Service

Map (IPSM). The IPSM can be downloaded from

http://www.hp.com/

support

Remove the jumper from pins 2 and 3.

Place the jumper on pins 1 or 2.

Clearing and Resetting the CMOS

187