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E–4 415606-001 Service Reference Guide, dx2200 MT

Troubleshooting Without Diagnostics

Solving Power Supply Problems

Problem Cause Solution

Power supply shuts down

intermittently.

Voltage selector switch

on rear of computer

chassis not switched to

correct line voltage.

Select the proper AC voltage.

Power supply fault. Replace the power supply.

Computer powered off

automatically and the

Power LED flashes every

four seconds.

Processor thermal

protection activated:

A fan may be blocked

or not turning.

The heatsink/fan

assembly is not properly

attached to the

processor.

1. Ensure that the computer air

vents are not blocked and the

cooling fan is running.

2. Open hood, press the power

button, and see if the processor

fan spins. If the processor fan is

not spinning, make sure the

fan's cable is plugged onto the

system board header. Ensure

the fan is fully/properly seated

or installed.

3. Replace the processor fan.

4. Reseat processor heatsink and

verify that the fan assembly is

properly attached.

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General

Chipset	Intel 945G Express
Memory	Up to 4 GB DDR2 SDRAM
Graphics	Integrated Intel Graphics Media Accelerator 950
Audio	Integrated High Definition audio
Network	Integrated 10/100/1000 Ethernet
Front Ports	2 USB 2.0, headphone, microphone
Power Supply	300W
Processor	Intel Pentium 4 or Intel Celeron
Optical Drive	DVD-ROM
Expansion Slots	1 PCI Express x16, 3 PCI
Operating System	Windows XP Professional or FreeDOS
Rear Ports	4 USB 2.0, VGA, Ethernet, Line-in, Line-out, Microphone
Storage	SATA Hard Drive (capacity varies)
USB Ports	8 USB 2.0 (2 front, 4 rear, 2 internal)