HP dx7400 - Microtower PC Troubleshooting Guide

Solving Processor Problems
If you encounter processor problems, common causes and solutions are listed in the following table.
Table 2-14 Solving Processor Problems
Poor performance is experienced.
Cause Solution
Processor is hot. 1. Make sure the airflow to the computer is not blocked.
2. Make sure the fans are connected and working properly
(some fans only operate when needed).
3. Make sure the processor heatsink is installed properly.
Power LED flashes Red three times, once every second, followed by a two second pause.
Cause Solution
Processor is not seated properly or not installed. 1. Check to see that the processor is present.
2. Reseat the processor.
Power LED flashes Red eleven times, once every second, followed by a two second pause.
Cause Solution
The current processor does not support a feature previously
enabled on this system.
1. Install a TXT capable processor.
2. Disable TXT in the Computer Setup (F10) utility.
3. Reinstall the original processor.
ENWW Solving Processor Problems 39

HP dx7400 - Microtower PC Specifications

General

Memory	Up to 8 GB DDR2 SDRAM
Audio	Integrated High Definition Audio
Power Supply	300W
Processor	Intel Core 2 Duo, Pentium Dual-Core, or Celeron
Storage	SATA Hard Drive
Optical Drive	DVD-ROM, DVD+/-RW
Graphics	Integrated Intel Graphics Media Accelerator 3100
Networking	Integrated Gigabit Ethernet
Expansion Slots	1 PCI Express x16
Ports	1 serial, 1 parallel, audio in/out
Operating System	Windows XP Professional