Specifications
Table Of Contents
- Product Features
- Activating and Customizing the Software
- Computer Setup (F10) Utility
- Illustrated parts catalog
- Serial ATA (SATA) Drive Guidelines and Features
- Routine Care and Disassembly Preparation
- Removal and Replacement Procedures – Microtower (MT) Chassis
- Removal and Replacement Procedures – Small Form Factor (SFF) Chassis
- Troubleshooting Without Diagnostics
- Safety and Comfort
- Before You Call for Technical Support
- Helpful Hints
- Solving General Problems
- Solving Power Problems
- Solving Hard Drive Problems
- Solving Media Card Reader Problems
- Solving Display Problems
- Solving Audio Problems
- Solving Printer Problems
- Solving Keyboard and Mouse Problems
- Solving Hardware Installation Problems
- Solving Network Problems
- Solving Memory Problems
- Solving Processor Problems
- Solving CD-ROM and DVD Problems
- Solving USB Flash Drive Problems
- Solving Front Panel Component Problems
- Solving Internet Access Problems
- Solving Software Problems
- Contacting Customer Support
- HP PC Hardware Diagnostics
- Backup and Recovery
- Power Cord Set Requirements
- POST Error Messages
- Password Security and Resetting CMOS
- Specifications
- Index
Solving Power Problems
Common causes and solutions for power problems are listed in the following table.
Table A-2 Solving Power Problems
Power supply shuts down intermittently.
Cause Solution
If equipped with a voltage selector, voltage selector switch
on rear of computer chassis (some models) not switched to
correct line voltage (115V or 230V).
Select the proper AC voltage using the selector switch.
Power supply will not turn on because of internal power
supply fault.
Replace the power supply.
Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a
two second pause, and the computer beeps two times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause Solution
Processor thermal protection activated:
A fan may be blocked or not turning.
OR
The heat sink is not properly attached to the processor.
1. Ensure that the computer air vents are not blocked and
the processor cooling fan is running.
2. Open the access panel, press the power button, and
see if the processor fan (or other system fan) spins. If
the fan does not spin, make sure the fan cable is
plugged onto the system board header.
3. If fan a plugged in and not spinning, replace it.
148 Appendix A Troubleshooting Without Diagnostics