HP 2504AT Hard disk drive problems, If an external display does not work, If files are corrupted

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Troubleshooting and Maintenance

Troubleshooting Your Notebook

If an external display does not work

•Check the connections.

•Press Fn+F5 in case the external monitor was disabled. (Do this three times to return to the state you started from.)

•The external monitor may not be detected. In the BIOS Setup utility, try setting Video Display Device to Both in the System Devices menu.

•If you’re using a TV connected to the S-video port, you must activate the TV.

Hard disk drive problems

If the notebook hard drive doesn’t spin

•Make sure the notebook has power. If necessary, connect the AC adapter, and make sure it is fully plugged into a power source and into the back of the notebook.

•Remove and reinsert the hard drive.

If the hard disk makes a buzzing or whining noise

•Back up the drive immediately.

•See whether the noise is coming from elsewhere, such as from the fan or a PC Card drive.

If files are corrupted

•Open My Computer, and the disk you want to scan. Select File > Properties. Select the Check Now box under the Error-checking section of the Tools tab.

•Run the virus-scanning program.

•If necessary, you can format the hard disk and reinstall the original factory software using the QuickRestore System Recovery CD.

Reference Guide 69

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Contents Compaq Notebook Series Reference Guide Ii Reference Guide Important Safety Information Iv Reference Guide Software Product License AgreementReference Guide Vi Reference Guide Contents Batteries and Power Management Index Getting Started with Your Notebook Series 2100 and N1050v Identifying Parts of the NotebookIdentifying Parts of the Notebook Mini-PCI cover no user parts inside Series Identifying Parts of the Notebook Identifying Parts of the Notebook Hard disk drive activity Power modeBattery status Status LightsIdentifying Parts of the Notebook Insert the battery Setting Up Your NotebookConnect AC power Connect a phone line Set up Windows Turn on the notebookHint Basic Operation Operating Your Notebook Default power settingsPower mode To enter this mode Function Standby -PowerTo change the boot device To reset the notebookTo use the TouchPad This hot key Does this To use the function hot keysTo program a One-Touch button To use the One-Touch buttonsTo use the Windows and Applications keys To use the ALT GR keyThis key combination Does this Could stop responding and you could lose data Using CDs or DVDsTo create or copy CDs To play DVD moviesWindows To set up password protectionSecuring Your Notebook To lock your notebookTo protect against viruses To attach a security cableHard disk drive To lock the hard disk driveTaking Care of Your Notebook To protect your hard disk driveTo maintain your notebook To safeguard your data To clean your notebookTo extend the life of the display Batteries and Power Management Managing Power Consumption How the notebook manages power automaticallyInformation that was not saved will be lost Unsaved data if the notebook battery runs down completely Changing timeout settings and creating power schemesUsing Battery Power To check battery statusTo respond to a low-battery warning To get the most from your batteries To recharge the batteryUsing Battery Power Modem and Network Connections Telephone line type prior to connecting your phone line Using the ModemSpecial restrictions in certain countries To change your modem settingsConnecting to a Local Area Network LAN Making Wireless Network Connections select models only Connecting to an Existing Wireless NetworkTo prepare for connections Creating a New Notebook-to-Notebook Network Ad Hoc Purchase a license before using the wireless function Individual wireless functionsTurning on communication and making a connection Turning off communication and ending a connection Function Making Wireless Bluetooth Connections select models onlyTo turn Bluetooth communication on and off Turning on Bluetooth communicationTurning off Bluetooth communication To prepare for Bluetooth connectionsTo send or receive files using Bluetooth Sharing files with another Bluetooth device FTPSending Outlook data to another Bluetooth device OPP Add-On Devices Connecting External Devices Connecting PC Cards To insert or remove a PC CardInserting a PC Card Connecting External Devices Replicator Series 2100 and N1050v External microphone connector pinkAudio recorder These jacks may damage the notebookTo use an external monitor Connecting an external monitorSwitching the display to the external monitor Adjusting monitor resolution and other settingsTo connect an Ieee 1394 device select models only Using dual display modeTransferring files through an infrared connection Using the infrared portTo connect an infrared device select models only Printing to an infrared printerTo use a port replicator select models only To dock to the port replicator To undock from the port replicator Installing Additional RAM Memory To install a RAM expansion moduleBack of the notebook Series 2100 To remove a RAM expansion module Installing Additional RAM Memory To replace the hard disk drive Replacing the Hard Disk DriveTo replace the hard disk drive holder To prepare a new hard disk drive Troubleshooting and Maintenance If sound does not record Troubleshooting Your NotebookAudio problems If no sound is audibleIf a DVD plays erratically CD-ROM and DVD problemsIf you can’t boot from a CD or DVD If you get a Region Code error when playing a DVD movieDisplay problems If the hard disk makes a buzzing or whining noise Hard disk drive problemsIf an external display does not work If the notebook hard drive doesn’t spinIf the notebook gets abnormally hot Heat problemsInfrared problems If you have problems with infrared communicationsIf the TouchPad moves the pointer or cursor while you type Keyboard and pointing device problemsIf the pointer is difficult to control If the TouchPad doesn’t workIf a network connection responds slowly Local area network LAN problemsIf the built-in network adapter doesn’t connect to the LAN If you can’t log in to Netware serversModem problems Memory problemsIf the modem isn’t detected If the modem doesn’t dial or no dial tone is detectedIf the modem dials incorrectly If the modem dials but doesn’t connectIf the modem doesn’t fax If the modem causes an Error messageIf the modem dials but you can’t hear it If the modem connects, but transferred data is badPerformance problems PC Card Pcmcia problemsIf the notebook keeps beeping Power and battery problemsIf the notebook stops responding If the notebook turns off immediately after it turns onIf the battery doesn’t charge If the Time Remaining for the battery is not correctIf the notebook has a short operating time Printing problems If the serial or parallel port is not working Serial, parallel, and USB problemsIf a serial mouse doesn’t work If a serial modem doesn’t work properlyStartup problems If you have problems with wireless 802.11 communication Wireless problemsIf your notebook cannot detect any Bluetooth devices If your notebook cannot detect a certain Bluetooth deviceIf you can connect, but the network is slow To run the Bios Setup utility Configuring the NotebookMain Menu Setting Description DefaultSecurity Menu To change video memory settings using Bios Setup utility To replace a damaged QuickRestore System Recovery CD Reinstalling and Updating SoftwareReference Information Command Conexant Modem Reference InformationModem Reference Conexant G ,h ,i G,h +MCR ECC Commands +FMR AT* CommandsCode Meaning Register Function Conexant Range/units DefaultSafety Information Power CordsCountry or Region Rated Voltage and Current Laser Safety Battery SafetyMercury Safety LED SafetyExposure to Radio Frequency Radiation Connections to Peripheral Devices Regulatory InformationRegulatory Information Trade name CanadaDeclaration of Conformity U.S.A Responsible PartyEuropean Union Regulatory Information Japan Telecommunications Approval JapanConexant AMC20493-KT5 Data Fax Modem PTC 211/02/071 New ZealandPTC200 7.5.2 3 4 Ringer Sensitivity Russia InternationalEMC Index QuickRestore System Recovery USB

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