HP dc5750 manual Cause Solution

Table 2-1Solving General Problems (continued)

Poor performance is experienced.

Cause	Solution
Too many applications running.	1.	Close unnecessary applications to free up memory.
		Some applications run in the background and can be
		closed by right-clicking on their corresponding icons in the
		task tray. To prevent these applications from launching at
		startup, go to Start > Run and type msconfig. On the
		Startup tab of the System Configuration Utility, uncheck
		applications that you do not want to launch automatically.
			CAUTION Do not prevent applications from
			launching at startup that are required for proper
			system operation.
	2.	Add more memory.
Some software applications, especially games, are stressful	1.	Lower the display resolution for the current application or
on the graphics subsystem		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.

OR

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.

12 Chapter 2 Troubleshooting Without Diagnostics ENWW