HP Compaq dc7900 USDT Spezifikationen PDF herunterladen (Seite 254)

Poor performance is experienced.

Cause Solution

(Windows Vista) and type msconfig. On the Startup tab

of the System Configuration Utility, clear applications that

you do not want to launch automatically.

Some software applications, especially games, are stressful

on the graphics subsystem

1. Lower the display resolution for the current application or

consult the documentation that came with the application

for suggestions on how to improve performance by

adjusting parameters in the application.

2. Add more memory.

3. Upgrade the graphics solution.

Cause unknown. Restart the computer.

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.

The heatsink 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 hood, press 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.

3. If fan is plugged in, but is not spinning, then replace the

heatsink/fan assembly.

4. Contact an authorized reseller or service provider.

System does not power on and the LEDs on the front of the computer are not flashing.

Cause Solution

System unable to power on. Press and hold the power button for less than 4 seconds. If the

hard drive LED turns green, then:

1. Check that the voltage selector, located on the rear of the

power supply on some models, is set to the appropriate

voltage. Proper voltage setting depends on your region.

2. Remove the expansion cards one at a time until the

5V_aux light on the system board turns on.

3. Replace the system board.

Press and hold the power button for less than 4 seconds. If the

hard drive LED does not turn on green then:

1. Check that the unit is plugged into a working AC outlet.

2. Open hood and check that the power button harness is

properly connected to the system board.

Table D-1 Solving General Problems (continued)

242 Appendix D Troubleshooting Without Diagnostics

1 2 ... 249 250 251 252 253 254 255 256 257 258 259 ... 299 300

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