Dell PP30L manual Troubleshooting Tools, Diagnostic Lights, Hardware Troubleshooter

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Troubleshooting

Dell Precision™ Service Manual

Troubleshooting Tools

Solving Problems

Dell™ Technical Update Service

Troubleshooting Tools

Diagnostic Lights

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer.

Your computer has three keyboard status lights located above the keyboard. During normal operation, the keyboard status lights display the current status (on or off) of the Num Lock, Caps Lock, and Scroll Lock features. If the computer starts without error, the lights flash, and then turn off. If the computer malfunctions, however, you can use the status of the lights to help identify the problem.

NOTE: After the computer completes POST, the Num Lock light may remain on, depending on your BIOS settings. For more information on using the system setup program, see the Dell™ Technology Guide on your computer or at support.dell.com.

Diagnostic Light Codes During POST

To troubleshoot a problem with your computer, read the sequence of the keyboard status lights in order from left to right (Num Lock, Caps Lock, and then

Scroll Lock). If the computer malfunctions the individual lights display a status of either On , Off , or Flashing .

Light	Problem Description	Suggested Resolution
Pattern
	No memory modules are	• If two or more memory modules are installed, remove the modules (see Removing a Memory Module), then
	detected.	reinstall one module (see Replacing a Memory Module) and restart the computer. If the computer starts
		normally, continue to install additional memory modules (one at a time) until you have identified a faulty
		module or reinstalled all modules without error.
		• If available, install working memory of the same type into your computer (see Memory).
		• If the problem persists, contact Dell Support.
	Memory modules are	• If two or more memory modules are installed, remove the modules (see Removing a Memory Module), then
	detected, but a memory	reinstall one module (see Replacing a Memory Module) and restart the computer. If the computer starts
	failure has occurred.	normally, continue to install additional memory modules (one at a time) until you have identified a faulty
		module or reinstalled all modules without error.
		• If available, install working memory of the same type into your computer (see Memory).
		• If the problem persists, contact Dell Support.
	A possible processor	• Reseat the processor (see Removing the Processor Module).
	failure has occurred.	• If the problem persists, contact Dell Support.
	A possible graphics	• Reseat any installed graphics cards.
	card/video failure has	• If available, install a working graphics card into your computer.
	occurred.	• If the problem persists, contact Dell Support.
	A possible display failure	• Reseat the display cable (see Removing the Display Assembly).
	has occurred.	• If the problem persists, contact Dell Support.
	SPD data indicates all	• Remove the unusable memory module (see Removing a Memory Module).
	SODIMMs are unusable.	• Replace with a usable memory module (see Replacing a Memory Module).

Hardware Troubleshooter

If a device is either not detected during the operating system setup or is detected, but incorrectly configured, you can use the Hardware Troubleshooter to resolve the incompatibility.

Windows XP:

1.Click Start→ Help and Support.