HP dx2480 manual Problem Cause Solution

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Troubleshooting

Problem

Cause

Solution

Blank screen (no video)	You may have a screen
(continued).	blanking utility installed or
	energy saver features are
	enabled.

Press any key or click the mouse button and, if set, type your password.

Computer is in standby	Press the power button to
mode.	resume from standby mode.

CAUTION: When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

You are using a fixed-sync monitor and it will not sync at the resolution chosen.

Be sure that the monitor can accept the same horizontal scan rate as the resolution chosen.

The VGA/BNC selector switch on the monitor (some models) is not properly set.

Set the selector switch to agree with the cable connection.

Bad monitor.

Try a different monitor.

Power LED is flashing and computer will not start.

Initernal error has occurred and the computer is flashing a code.

Refer to "Interpreting Diagnostic Lights and Audible Codes" to interpret the error code.

Troubleshooting Guide

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Contents Hardware Reference Manual Hardware Reference Guide Hardware Reference Guide Contents Security Lock Provisions Product Features Standard Configuration FeaturesFront Panel Components Front Panel ComponentsRear Panel Components Rear Panel ComponentsKeyboard Keyboard ComponentsWindows Logo Key Special Mouse FunctionsSerial Number Location Hardware Upgrades Serviceability FeaturesRemoving the Computer Access Panel Removing the Front Bezel DIMMs Installing Additional MemoryDDR2-SDRAM DIMMs Populating Dimm Sockets Installing DIMMs Installing a Dimm Removing a 5.25 Drive Bezel Blank Replacing or Upgrading a Drive Locating Drive Positions Drive PositionsRemoving a Drive Hard disk is inserted or slide out from the back Replacing a Drive Sliding the Drives into the Drive Cage Sliding the Hard Drive into the Drive Cage Install Second Hard Disk Hardware Upgrades Hardware Upgrades Removing or Installing an Expansion Card Releasing the Slot Cover Lock Removing an Expansion Slot Cover Removing an Expansion Card Replacing or Adding an Expansion Card Securing the Expansion Cards and Slot Covers Reassembling the Computer Turn on the computer by pressing the power button Battery Replacement Hardware Reference Guide Power Supply Notice Power Supply Label Chassis Intrusion Switch Installing a Security LockMechanical Lock Preventing Electrostatic Damage Grounding MethodsHardware Reference Guide Computer Operating Guidelines and Routine Care Optical Drive Precautions CleaningSafety OperationShipping Preparation Computer Setup F10 Utility Guide Computer Setup F10 Utility Guide Contents Contents Computer Setup F10 Utility Computer Setup F10 UtilitiesUsing Computer Setup F10 Utilities Computer Setup F10 Utility Computer Setup Heading Option DescriptionCHS 1MB 3BC/IRQ7 Computer Setup Heading Option Description Troubleshooting Guide Troubleshooting Guide Computer Diagnostic Features HP Insight DiagnosticsAccessing HP Insight Diagnostics Survey Tab Test Tab UnattendedStatus Tab Saving and Printing Information in HP Insight Diagnostics Log TabDownloading the Latest Version of HP Insight Diagnostics Troubleshooting Safety and Comfort Before You Call for Technical SupportTroubleshooting Run the Restore Plus! DVD Helpful HintsTroubleshooting Solving General Problems Problem Cause SolutionTo permit required airflow Cable connections are Problem Cause Solution Solving Hardware Installation Problems Interpreting Diagnostic Lights and Audible Codes Problem CauseDiagnostic Front Panel LEDs and Audible Codes Diagnostic Front Panel LEDs and Audible Codes Restoring the Software Contacting Customer Support