Solving Power Problems | HP 8200 SM774UP guide

Solving Power Problems

Common causes and solutions for power problems are listed in the following table.

Table C-2Solving Power Problems

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:	1.	Ensure that the computer air vents are not blocked and
	A fan may be blocked or not turning.		the processor cooling fan is running.
	A fan may be blocked or not turning.	2.	Open hood, press power button, and see if the
	OR	2.	Open hood, press power button, and see if the
	OR		processor fan spins. If the processor fan is not spinning,
	The heat sink is not properly attached to the processor.		make sure the fan's cable is plugged onto the system
	The heat sink is not properly attached to the processor.		board header.
		3.	If fan is plugged in, but is not spinning, then replace the
			heat sink/fan assembly.

Power LED flashes red four times, once every second, followed by a two second pause, and the computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause	Solution

Power failure (power supply is overloaded).	1.	Check if a device is causing the problem by removing
		ALL attached devices (such as hard, diskette, or optical
		drives, and expansion cards). Power on the system. If
		the system enters the POST, then power off and
		replace one device at a time and repeat this procedure
		until failure occurs. Replace the device that is causing
		the failure. Continue adding devices one at a time to
		ensure all devices are functioning properly.
	2.	Replace the power supply.
	3.	Replace the system board.

Solving Power Problems 101

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HP 8200 SM774UP manual Table C-2Solving Power Problems

Contents

Maintenance & Service Guide Maintenance & Service Guide Iii About This Book Iv About This Book Table of contents Removal and Replacement Procedures All-in One AIO Chassis 102 101104 107 Microphone 130 Headphone 131 Line-in Audio Line-out Audio Ethernet BNC 130All-in One Models 134 Viii Overview Product FeaturesPage Front Components Front Components1Front Components Component 2Side Components Side Components Rear Components Rear Components3Rear Components 5Adjusting Tilt Product Features Adjusting Tilt Installing the Operating System Installing and Customizing the SoftwareDownloading Microsoft Windows Updates Accessing Disk Image ISO Files Installing or Upgrading Device Drivers Windows systemsProtecting the Software Computer Setup F10 Utilities Computer Setup F10 Utility Using Computer Setup F10 Utilities 1Computer Setup-File Computer Setup-File 2Computer Setup-Storage Computer Setup-StorageOption Description Device Configuration Storage Options Removable Media Boot Shortcut to Temporarily Override Boot Order Boot OrderDPS Self-Test 3Computer Setup-Security Computer Setup-Security Slot Security Network BootSystem IDs DriveLock Security System Security 4Computer Setup-Power Computer Setup-Power 5Computer Setup-Advanced Computer Setup-Advanced Device Options AMT Configuration Serial ATA Hard Drive Characteristics Serial ATA Sata Drive Guidelines and FeaturesSata Hard Drives Sata Hard Drive Cables Hard Drive Capacities Smart ATA DrivesSmart ATA Drives All-in One Chassis DesignationAn all-in one form factor is available Generating Static Electrostatic Discharge InformationPreventing Electrostatic Damage to Equipment Relative Humidity Event 55% 40% 10% Grounding the Work Area Personal Grounding Methods and EquipmentRecommended Materials and Equipment Static Shielding Protection Levels Operating Guidelines Cleaning the Computer Case General Cleaning Safety PrecautionsCleaning the Keyboard Routine Care Cleaning the Monitor Service ConsiderationsCleaning the Mouse Tools and Software Requirements Lithium Coin Cell Battery Cables and ConnectorsHard Drives Preparing to Disassemble the Computer Removal and Replacement Procedures All-in One AIO Chassis Synchronizing the Optional Wireless Keyboard or Mouse Page Center Access Panel Stand Memory Access Panel Drive Access Panel Page Optical Drive Page 14Loosening the hard drive security screw Hard Drive Hard DrivePage Slide the hard drive out of the cage Memory 20Removing a memory module Memory Page Top Panel Webcam Module Page Rear Cover System Board Cover Page Sidekey Board Page Page Converter Board Page Speakers Wlan Module Page Heat Sink Thermal Module Lift the heat sink from the computer 44Removing the processor Processor ProcessorPage Fan Assembly Page Display Cable Page System Board Updating Smbios Information Go to Security System ID’s Setup Field Name Comment Label Removal and Replacement Procedures All-in One AIO Chassis Stand Bracket Page Hard Drive and Optical Drive Cables and Connectors Page Front Bezel Display Panel Page Page 60Samsung panel bracket locations Page Cmos Password Security and Resetting Appendix a Password Security and Resetting Cmos Establishing a Setup or Power-on Password Resetting a Setup or Power-on Password Clearing and Resetting the Cmos Locate, press, and hold the Cmos button in for five seconds Clearing and Resetting the Cmos Post Error Messages Post Numeric Codes and Text Messages Post Numeric Codes and Text MessagesTable B-1Numeric Codes and Text Messages Appendix B Post Error Messages Test under Storage DPS Self-test Appendix B Post Error Messages Bios Appendix B Post Error Messages Options SERR# Generation Disable Table B-2Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Board needs to be replaced Safety and Comfort Troubleshooting Without DiagnosticsSafety and Comfort Appendix C Troubleshooting Without Diagnostics Solving General ProblemsTable C-1Solving General Problems Computer date and time display is incorrect Cause Solution There is no sound or sound volume is too low Cause Solution Solving General ProblemsPoor performance is experienced Cause Solution Cause Solution Solving Power Problems Solving Power ProblemsTable C-2Solving Power Problems Table C-3Solving Diskette Problems Solving Diskette Problems Solving Diskette Problems Table C-4Solving Hard Drive Problems Solving Hard Drive Problems Power-On Solving Hard Drive ProblemsAdvanced Power-On Options Nonsystem disk/NTLDR missing message Cause Solution Computer seems to be locked up Cause Solution Computer will not boot from hard drive Cause Solution Solving Media Card Reader Problems Solving Media Card Reader ProblemsTable C-5Solving Media Card Reader Problems Can not write to the media card Cause Table C-6Solving Display Problems Solving Display ProblemsBlank screen no video Cause Solution Dim characters Cause Solution Solving Display Problems Out of Range displays on screen Cause Solution Image is not centered Cause SolutionSelect ImageControl/ Horizontal Position or Vertical Symbol. Click Start All Programs Accessories Certain typed symbols do not appear correct Cause Solution Table C-7Solving Audio Problems Solving Audio Problems Sound from headphones is not clear or muffled Cause Solving Audio ProblemsThere is no sound or sound volume is too low Cause Line-in jack is not functioning properly Cause Solving Keyboard and Mouse Problems Solving Printer ProblemsTable C-8Solving Printer Problems Table C-9Solving Keyboard Problems Solving Keyboard and Mouse ProblemsTable C-10Solving Mouse Problems Appendix C Troubleshooting Without Diagnostics Solving Hardware Installation Problems Solving Hardware Installation ProblemsTable C-11Solving Hardware Installation Problems Computer will not start Cause Solution Solving Network Problems Table C-12Solving Network Problems Solving Network Problems Diagnostics reports a failure Cause Solving Memory Problems Solving Memory ProblemsTable C-13Solving Memory Problems New network card will not boot Cause Out of memory error Cause Solution Solving Processor ProblemsMemory count during Post is wrong Cause Solution Insufficient memory error during operation Cause Solution Solving CD-ROM and DVD Problems Solving CD-ROM and DVD ProblemsTable C-14Solving Processor Problems Table C-15Solving CD-ROM and DVD Problems Cannot eject compact disc tray-load unit Cause Movie will not play in the DVD drive Cause Solution Solving USB Flash Drive Problems Solving USB Flash Drive ProblemsTable C-16Solving USB Flash Drive Problems USB flash drive not found identified Cause Solution Table C-17Solving Internet Access Problems Solving Internet Access ProblemsSystem will not boot from USB flash drive Cause Solution Unable to connect to the Internet Cause Solution Solving Internet Access Problems Table C-18Solving Software Problems Solving Software Problems Contacting Customer Support Appendix D Connector Pin Assignments Connector Pin AssignmentsEthernet BNC Microphone Line-in Audio HeadphoneLine-out Audio Japanese Power Cord Requirements Power Cord Set RequirementsGeneral Requirements Country Accrediting Agency Country-Specific Requirements Appendix F Specifications SpecificationsTable F-1Specifications All-in One Models Index Audible codes 94 audio problems Sata