HP dx7400 - Microtower PC Troubleshooting Guide

After inserting a media card in the reader, the computer attempts to boot from the media card.
Cause Solution
The inserted media card has boot capability. If you do not want to boot from the media card, remove it during
boot or do not select the option to boot from the inserted media
card during the boot process.
Table 2-5 Solving Media Card Reader Problems (continued)
22 Chapter 2 Troubleshooting Without Diagnostics ENWW

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