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HP Microtower PC dx2200 Diagnostic Front Panel LEDs and Audible Codes

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Troubleshooting Without Diagnostics

POST Diagnostic Front Panel LEDs and Audible Codes

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This section covers the front panel LED codes as well as the audible codes that may occur before or during POST that do not necessarily have an error code or text message associated with them.

If you see flashing LEDs on a PS/2 keyboard look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes.

Recommended actions in the following table are listed in the order in which they should be performed.

Diagnostic Front Panel LEDs and Audible Codes

Activity	Beeps	Possible Cause	Recommended Action

Green Power LED	None	Computer on.	None
On.

Green Power LED	None	Computer in	None required. Press any key or move the
flashes every two		Suspend to RAM	mouse to wake the computer.
seconds.		mode (some
		models) or normal
		Suspend mode.

Power LED flashes	None	Processor thermal	1.	Ensure that the computer air vents are
every four seconds.		protection		not blocked and the processor
		activated:		cooling fan is running.
		A fan may be	2.	Open hood, press power button, and
		blocked or not		see if the processor fan spins. If the
		turning.		processor fan is not spinning, make
		OR		sure the fan's cable is plugged onto
		The heatsink/fan		the system board header. Ensure the
		The heatsink/fan		fan is fully/properly seated or
		assembly is not		fan is fully/properly seated or
		assembly is not		installed.
		properly attached		installed.
		properly attached	3.	If fan is plugged in and seated
		to the processor.	3.	If fan is plugged in and seated
				properly, but is not spinning, then
				replace processor fan.
			4.	Reseat processor heatsink and verify
				that the fan assembly is properly
				attached.
			5.	Contact an authorized reseller or
				service provider.

Power LED flashes	None	Pre-video memory	1.	Reseat DIMMs. Power on the system.
five times, once		error.	2.	Replace DIMMs one at a time to
every second,			2.	Replace DIMMs one at a time to
every second,				isolate the faulty module.
followed by a two				isolate the faulty module.
followed by a two			3.	Replace third-party memory with HP
second pause.			3.	Replace third-party memory with HP
second pause.				memory.
				memory.
			4.	Replace the system board.

E–26

415606-001

Service Reference Guide, dx2200 MT

Contents

Page Page Service Reference Guide Service Reference Guide Contents 1 Installing the Operating System 2 Setup Utilities and Diagnostics Features 3 Desktop Management 4 Serial and Parallel ATA Drive Guidelines and Features 5 Identifying the Chassis, Routine Care, and Disassembly Preparation 6 Removal and Replacement Procedures— Microtower (MT) Chassis AConnector Pin Assignments BPower Cord Set Requirements CPOST Error Messages DMemory ETroubleshooting Without Diagnostics Index Page Installing the Operating System 1.1.1 Installing or Upgrading Device Drivers 1.2.1 Windows XP Home and XP Professional Setup Utilities and Diagnostics Features 2.2.1Using Computer Setup (F10) Utilities Esc Save and Exit Setup Exit Without Saving Load Optimized Defaults 2.2.2 Computer Setup Menu Page Page Page Page Page Page 2.3.1Backing up the CMOS 2.3.2Restoring the CMOS Page Desktop Management 3.2.1FailSafe Boot Block ROM 3.2.2Dual-StatePower Button 3.2.3Power Management 3.2.4 World Wide Web Site 3.3.1 Password Security 3.3.2Establishing a Supervisor Password Using Computer Setup 3.3.3Establishing a User Password Using Computer Setup Entering a User Password Entering a Supervisor Password Changing a User or Supervisor Password Deleting a User or Supervisor Password Clearing Passwords 3.3.4Surge-TolerantPower Supply Page Serial and Parallel ATA Drive Guidelines and Features 4.2.1 SATA Data Cable 4.2.2 SATA Power Cable 4.4.1 PATA Data Cable 4.4.2 PATA Power Cable 4.5.1 PATA Device Classes General Attach Guidelines 4.8.1 Legacy Mode 4.8.2 Native Mode Identifying the Chassis, Routine Care, and Disassembly Preparation 5.1.1 Microtower (MT) 5.2.1 Generating Static 5.2.2 Preventing Electrostatic Damage to Equipment 5.2.3 Personal Grounding Methods and Equipment 5.2.4 Grounding the Work Area 5.2.5Recommended Materials and Equipment 5.3.1General Cleaning Safety Precautions 5.3.2Cleaning the Computer Case 5.3.3 Cleaning the Keyboard 5.3.4Cleaning the Monitor 5.3.5Cleaning the Mouse 5.4.1 Power Supply Fan 5.4.2Tools and Software Requirements 5.4.3Screws 5.4.4 Cables and Connectors 5.4.5Hard Drives 5.4.6Lithium Coin Cell Battery Page Removal and Replacement Procedures— Microtower (MT) Chassis 6.2Access Panel 6.3Front Bezel 6.4.1 5.25" Drive Bezel Blank 6.4.2 Removing a 3.5” Drive Bezel Blank 6.5.1Installing Memory Modules Page 6.6.1Expansion Slot Cover Lock 6.6.2 PCI/PCIe Expansion Card Page 6.7 Cable Management 6.7.1 Cable Connections 6.8.1Drive Positions 6.8.25.25" Drive 6.8.3 3.5" Drive Page 6.8.4Removing a 3.5” Hard Drive 6.9Front I/O Panel Housing Assembly 6.9.1Power Switch Assembly 6.10Speaker 6.11System Fan 6.12Heatsink 6.13Processor Page 6.14System Board 6.15 Battery 6.15.1Type 1 Battery Holder 6.15.2Type 2 Battery Holder 6.15.3Type 3 Battery Holder 6.16Power Supply Page Connector Pin Assignments Parallel Interface Serial Interface, Powered and Non-Powered USB Microphone Connector and Icon (1/8" miniphone) Pin Headphone Line-InAudio Line-OutAudio Monitor ATA/ATAPI (IDE) Standard Drive Cable Connector 24-PinPower 4-PinPower (for CPU) Power Cord Set Requirements General Requirements Country-SpecificRequirements POST Error Messages Page Load Default Settings > Save and Exit Control Panel Page POST Diagnostic Front Panel LEDs and Audible Codes POST Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause POST Diagnostic Front Panel LEDs and Audible Codes (Continued) Beeps Possible Cause Page Memory Page Troubleshooting Without Diagnostics Solving Minor Problems Solving Minor Problems Problem Cause Possible Solution Solving Minor Problems (Continued) Solving Power Supply Problems Solving Power Supply Problems Solution Solving Diskette Problems Solving Diskette Problems Start Explore drive. Select File > Properties Solving Hard Drive Problems Solving Hard Drive Problems File > Properties > Tools Error-checking Check Now Solving Hard Drive Problems (Continued) Advanced > Power-On controllers in Storage > Storage Options Page Solving Display Problems Solving Display Problems standby select Enable VGA Mode Display Solving Display Problems (Continued) Click Start > All Programs Accessories > System Tools Character Map Solving Audio Problems Solving Audio Problems Speaker Control Panel System Solving Audio Problems (Continued) Output Mode Solving Printer Problems Solving Printer Problems DIR C:\ > [printer port] where [printer port] is the Solving Keyboard and Mouse Problems Solving Keyboard Problems Solving Hardware Installation Problems Add New Hardware Control Panel Add Hardware Wizard Solving Hardware Installation Problems Solving Hardware Installation Problems (Continued) Solving Network Problems Solving Network Problems Solving Network Problems (Continued) Network Solving Memory Problems Solving Memory Problems Solving Processor Problems Solving Processor Problems Solving CD-ROMand DVD Problems Solving CD-ROMand DVD Problems Solving CD-ROMand DVD Problems (Continued) Solving Drive Key Problems Solving Drive Key Problems Solving Internet Access Problems Solving Internet Access Problems Solving Internet Access Problems (Continued) 1. Select Start > Control Panel Internet General Select Start > Control click the Device Manager Ports (COM & LPT) Properties Diagnostic Front Panel LEDs and Audible Codes Diagnostic Front Panel LEDs and Audible Codes (Continued) Page Index