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Service Reference Guide 483941-001 D–3
Troubleshooting Without Diagnostics
Computer date and time
display is incorrect.
RTC (real-time clock)
battery may need to be
replaced.
✎
MConnecting the
computer to a live
AC outlet prolongs
the life of the
RTC
battery.
First, reset the Date and Time
Properties in the Control Panel
(Computer Setup can also be used to
update the RTC
date and time). If the
problem persists, replace the RTC
battery. See the Hardware Reference
Guide on the Library CD for
instructions on installing a new
battery.
Cursor will not move
using the arrow keys on
the keypad.
The Num Lock key
may
be on.
Press the Num Lock key. The
Num
Lock light should not be on if you
want to use the arrow keys. The Num
Lock key can be disabled (or
enabled) in Computer Setup.
Poor performance is
experienced.
Processor is hot. 1. Ensure airflow to the computer is
not blocked. Leave a 4-inch (10.2-
cm) clearance on all vented sides
of the computer and monitor to
permit required airflow.
2. Ensure fans are connected and
working properly (some fans only
operate when needed).
3. Ensure the processor heatsink is
installed properly.
Poor performance is
experienced (continued).
Hard drive is full. Transfer data from the hard drive to
create more space on the hard drive.
Low on memory. Add more memory.
Hard drive is fragmented. Defragment hard drive.
Program previously
accessed did not release
reserved memory back to
the system.
Restart the computer.
Virus resident on the hard
drive.
Run the virus protection program.
Too many applications
running.
1. Close unnecessary applications to
free up memory.
2. Add more memory.
Problem Cause Solution
- Business PCs 1
- 1st Edition 1
- Service Reference Guide 2
- First Edition (February 2008) 3
- Contents 4
- A Connector Pin Assignments 6
- B Power Cord Set Requirements 6
- C POST Error Messages 6
- E Memory 6
- Redflag Linux 7
- 1.3 HP Software 8
- 2.1 Power-On Self-Test (POST) 9
- 2.2 Computer Setup Utilities 10
- 2.2.2 Computer Setup Menu 12
- Computer Setup (Continued) 13
- 2.3.1 Backing up the CMOS 19
- 2.3.2 Restoring the CMOS 19
- Desktop Management 20
- 3.2.2 Dual-State Power Button 21
- 3.2.3 Power Management 21
- 3.3 Security 22
- Entering a User Password 23
- Clearing Passwords 25
- 4.1 SATA 3.0 Hard Drives 26
- 4.2 SATA Hard Drive Cables 27
- 4.3 SATA SMART Drives 28
- 4.4 Drive Capacities 28
- 4.5 SATA BIOS 28
- Disassembly Preparation 29
- 5.2.1 Generating Static 31
- 5.2.4 Grounding the Work Area 32
- 5.3 Routine Care 33
- 5.3.3 Cleaning the Keyboard 34
- 5.3.4 Cleaning the Monitor 34
- 5.3.5 Cleaning the Mouse 34
- 5.4 Service Considerations 35
- 5.4.3 Cables and Connectors 36
- 5.4.4 Hard Drives 36
- MT chassis and SFF chassis) 38
- (SFF chassis) 40
- Removing the Front Bezel 41
- Minitower Configuration 42
- 6.4 Front Drive Bezels 43
- 6.5 Memory 44
- Installing a DIMM 46
- 6.6 Expansion Cards 47
- Installing an Expansion Card 50
- 6.7 Cable Management 52
- 6.8 Drives 53
- 6.8.2 Removing a Drive 54
- Removing the Hard disk 55
- Releasing the Hard Drive Cage 55
- Removing the Hard Drive Cage 56
- Removing the Hard Drive 57
- Desktop Drive Positions 57
- Installing the Optical Drive 60
- 6. Press the latch 1 63
- 6.10 System Fan 65
- 6.11 Heatsink - MT chassis 66
- 6.12 Processor 67
- 6.13 System Board 69
- 6.14 Battery 70
- 6.14.1 Battery Holder 71
- 6.15 Power Supply 72
- Connector Pin Assignments 73
- Parallel Interface 74
- Microphone 74
- Headphone 75
- Line-In Audio 75
- Line-Out Audio 75
- 24-Pin Power 76
- 4-Pin Power (for CPU) 76
- Power Cord Set Requirements 77
- POST Error Messages 78
- Preliminary Checklist 81
- Solving General Problems 82
- Solving Display Problems 87
- Solving Audio Problems 90
- Solving Printer Problems 92
- Solving Keyboard Problems 93
- Solving Network Problems 94
- Solving Memory Problems 96
- Solving Processor Problems 97
- Solving Drive Key Problems 99
- Restoring the Software 105
- Contacting Customer Support 106
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