HP 700 G1 manual Solving power problems, Power supply shuts down intermittently Cause Solution

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Solving power problems

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

Power supply shuts down intermittently.

Cause	Solution

If equipped with a voltage selector, voltage selector switch on	Select the proper AC voltage using the selector switch.
rear of computer chassis (some models) not switched to correct
line voltage (115V or 230V).

Power supply will not turn on because of internal power supply	Replace the power supply.
fault.

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 the
A fan may be blocked or not turning.		processor cooling fan is running.
A fan may be blocked or not turning.
OR	2.	Open the access panel, press the power button, and see if
OR		the processor fan (or other system fan) spins. If the fan does

The heat sink is not properly attached to the processor.		not spin, make sure the fan cable is plugged onto the
The heat sink is not properly attached to the processor.		system board header.
		system board header.
	3.	If fan a plugged in and not spinning, replace it.

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.	If equipped with a voltage selector, check that the voltage
		selector, located on the rear of the power supply (some
		models), is set to the appropriate voltage. Proper voltage
		setting depends on your region.
	2.	Open the access panel and ensure the power supply cable is
		seated into the connector on the system board.
	3.	Check if a device is causing the problem by removing ALL
		attached devices (such as hard drives or optical drives and
		expansion cards). Power on the system. If the system enters
		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.
	4.	Replace the power supply.
	5.	Replace the system board.

72 Chapter 6 Troubleshooting without diagnostics

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Contents Maintenance and Service Guide Product notice Safety warning notice IiiIv Safety warning notice Table of contents Sata data cable System board callouts103 106107 108122 123126 ViiiProduct features Standard configuration featuresProduct features Front panel componentsRear panel components Rear panel componentsSerial number location Computer major components Illustrated parts catalogMicrotower MT chassis spare parts Illustrated parts catalog Sata data cable, 14 inch, 1 straight end, 1 angled end Item Description Front I/O assembly Sata drive power cableCables Misc parts USB Wireless Washable Smart card Antenna for use with Wlan cardOptical drives DrivesDescription Hard drives/Solid-state drives Item Description Misc boardsMicrotower MT chassis spare parts Relative Humidity Event 55% 40% 10% Electrostatic discharge informationGenerating static Preventing electrostatic damage to equipment Personal grounding methods and equipmentGrounding the work area Static Shielding Protection LevelsOperating guidelines Recommended materials and equipmentGeneral cleaning safety precautions Cleaning the Computer CaseCleaning the keyboard Routine careService considerations Cleaning the monitorCleaning the mouse Power supply fanCables and connectors Lithium coin cell batteryScrews Hard DrivesSerial ATA Hard Drive Characteristics Sata hard drivesSata hard drive cables Smart ATA drivesCable management Removal and replacement procedures Microtower MT chassis Preparation for disassemblyAccess panel Front bezel Optical drive bezel blank Memory DIMMsDDR3-SDRAM DIMMs Populating Dimm socketsInstalling DIMMs Page Expansion cards Removal and replacement procedures Microtower MT chassis Page Drives GB Solid-state Drive SSD Drive positions Removing a slim optical driveInstalling a slim optical drive Removing a hard drive Installing a hard drive Page Page Page Battery TypeType Drive power cable Front I/O and power switch assembly Page Removal and replacement procedures Microtower MT chassis Heat sink Processor Speaker Rear chassis fan Power supply Page System board Page System board callouts Sys Bd Label Color ComponentWhite Pin main power connector Blue Front I/O/power switchBlack Media card reader connector Black PCI Express USB3.0Computer Setup F10 Utility Computer Setup F10 UtilitiesUsing Computer Setup F10 Utilities Computer Setup-File Computer Setup-Storage Computer Setup F10 UtilityComputer Setup-Security Network Boot Master Boot SecurityDevice Security USB SecuritySecure Boot ConfigurationLegacy Support to disabled System Security theseComputer Setup-Power Hardware PowerOption Description ManagementComputer Setup-Advanced Power-On OptionsBios Power-On OptionVGA Configuration Connected BiosBus Options Device OptionsRecovering the Configuration Settings Troubleshooting without diagnostics Safety and comfort Before you call for technical supportHelpful hints Solving general problems Computer will not respond to keyboard or mouse CauseSolving general problems Under Windows System, click Run Poor performance Cause SolutionApps icon Processor thermal protection activated Solving power problems Power supply shuts down intermittently Cause SolutionSolving hard drive problems Solving hard drive problemsNonsystem disk/NTLDR missing message Cause Solution Storage Boot Order listComputer will not boot from hard drive Cause Solution Storage Boot OrderCan not write to the media card Cause Solving media card reader problemsSolving media card reader problems Solving display problems Inserted media card has boot capabilityBlank screen no video Cause Solution To the electrical outletSolving display problems Blank screen no video CauseDim characters Cause Solution Install the video drivers included in the upgrade kitBe sure the monitor cable is securely connected to Monitor needs to be degaussedImage is not centered Cause Solution Position may need adjustmentNo Connection, Check Signal Cable displays on screen Cause Horizontal or vertical position of the imageSound cuts in and out Cause Solution Solving audio problemsCertain typed symbols do not appear correct Cause Solving audio problems Solving printer problems Printer will not print Cause SolutionLine-in jack is not functioning properly Cause Control Panel , and then select Device ManagerSolving keyboard and mouse problems Solving keyboard and mouse problemsPrinter prints garbled information Cause Solution Make the proper network connections to the printerKeyboard connector is not properly connected Program in use has stopped responding to commandsShut down the computer using the keyboard Computer, and then restart the computerSolving Hardware Installation Problems Solving Hardware Installation ProblemsThat pins in the connector are not bent down Mouse may need repairComputer will not start Cause Solution Solving Network Problems Solving Network ProblemsNetwork status link light never flashes Cause Solution Correct operating mode Diagnostics reports a failure Cause SolutionSettings for the board Cable CorrectlySolving memory problems New network card will not boot Cause SolutionSolving memory problems Out of memory error CauseMemory count during Post is wrong Cause Solution Insufficient memory error during operation Cause SolutionSecurity Network Boot Solving CD-ROM and DVD problemsComputer Setup utility Cannot eject compact disc tray-load unit Cause Solving CD-ROM and DVD problemsMovie will not play in the DVD drive Cause Solution Solving USB flash drive problems USB flash drive not found identified Cause SolutionSystem will not boot from USB flash drive Cause Solution Security USB SecuritySolving front panel component problems Solving front panel component problemsSolving Internet access problems Solving software problems Delete buttonLog on to your ISP and launch the desired program System files may be damagedSelect Automatic Repair Solving software problemsAdvanced startup, click Restart now Post error messages Post error messagesPost numeric codes and text messages Control panel message Description Recommended actionDownload to Disable to prevent PXE Post numeric codes and text messagesFlash Screen Image Corrupted Flash Screen image has errors ECC Memory Module Detected ECCEnsure that none of the keys are DepressedPower Supply fan not detected Reseat power supply fanReconfigure card resources and/or run Computer Setup or Windows utilitiesSata Cabling Error One or more Sata devices are improperly Reboot the computerFunctionality contained in the system Bios System Bios versionActivity Beeps Possible cause Recommended action Causing the failure. Continue adding devices Pre-video graphics error For systems with a graphics cardRed Power LED flashes seven Times, once every second Unable to bootPress and hold the power button for less than Check that both power supply cables areReplace the power button harness. If Problem persists, replace the system boardPassword security and resetting Cmos Resetting the password jumperChanging a Setup or Power-On password Press Enter Deleting a Setup or Power-On passwordClearing and resetting the Cmos Page How to access and run HP PC Hardware Diagnostics HP PC Hardware DiagnosticsWhy run HP PC Hardware Diagnostics Diagnostic section, click HP Uefi Support Environment Restoring and recovering using Windows tools System backup and recoveryCreating recovery media and backups Using Reset when the system is not responding Select Reset Follow the on-screen instructions to continueBacking up, restoring, and recovering in Windows Creating recovery media Click All ProgramsTo create recovery discs Close all open programs To create the Windows DVD System backup and recoverySystem Restore Follow the on-screen instructions to set up your backupSystem Recovery System Recovery when Windows is respondingSystem Recovery when Windows is not responding Select Install now Page General Requirements Power Cord Set RequirementsJapanese Power Cord Requirements Country Accrediting Agency Country-Specific RequirementsCountry-Specific Requirements Statement of Volatility Appendix B Statement of VolatilityEnter the F10 setup utility Appendix C Specifications SpecificationsMT Specifications Rated Input Current Current Leakage Nfpa MT SpecificationsPlus Platinum Index 116 Installing Expansion card Hard drive Computer SetupMT heat sink MT power supply Helpful hints Hood sensor IllustratedMT bezel blank MT front bezel Optical drive Resetting 112 Safety and comfort Safety precautions CleaningSystem restore points, creating MT speaker

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