HP 2160US, 2500, 2186AF, 2183AF, 2182US To respond to a low-battery warning, To recharge the battery

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Note

CAUTION

Batteries and Power Management

Using Battery Power

To respond to a low-battery warning

The notebook automatically alerts you when the battery power drops to a critically low level. The notebook first emits a high-pitched beep or displays a warning message. Then, if you do not restore power within a short time, the notebook goes into Hibernation.

After the notebook enters Hibernation in this way, you will not be able to turn it on again until you restore power by doing one of the following procedures:

•Replace the battery with a charged one.

•Plug in the AC adapter.

If you plug in the AC adapter, you can continue to work while your battery recharges.

To recharge the battery

The AC adapter is normally warm whenever plugged into an AC outlet. The notebook is normally warm while recharging. Do not recharge the notebook in a briefcase or other confined space, or the battery could overheat.

Plug the AC adapter into the notebook.

To get the longest operating time, wait until the battery charge is below 50 percent before recharging, then charge it fully (100 percent). Charging can take several hours. If you continue working while the battery charges, the charging time may increase.

The operating time for a fully charged battery depends on the notebook model, power management settings, and level of use.

To get the most from your batteries

Follow these suggestions to make your battery power last as long as possible:

•Plug in the AC adapter, especially when using a CD-ROM or DVD drive, or any external connections such as a PC Card or a modem.

•Set the display brightness to the lowest comfortable level (Fn+F1).

Reference Guide 33

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Contents Compaq Notebook Series Reference Guide Reference Guide Second Edition March Part Number Important Safety Information Software Product License Agreement Iv Reference GuideReference Guide Vi Reference Guide Contents Batteries and Power Management Troubleshooting and Maintenance Index Getting Started with Your Notebook Identifying Parts of the Notebook Front panel and right panel componentsCD-ROM, DVD, or other drive Universal serial bus port USB Left panel and back panel components PC Card and CardBus slot and buttons Bottom panel components Identifying Parts of the Notebook Status lights Power modeBattery status Hard drive activityIdentifying Parts of the Notebook Setting Up Your Notebook Insert the batteryConnect AC power Connect a phone line Set up Windows Turn on the notebookHint Basic Operation Standby -Power Default power settingsPower mode To enter this mode Function Operating Your NotebookTo reset the notebook To change the boot deviceTouchPad on-off button and indicator light To use the TouchPadTo use the function hot keys This hot key Does thisTo use the One-Touch buttons To program a One-Touch buttonTo 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 insert or remove a CD or DVD Onto the spindleTo play DVD movies To create or copy CDsTo lock your notebook To set up password protectionSecuring Your Notebook WindowsTo attach a security cable To protect against virusesTo lock the hard drive Hard driveTaking Care of Your Notebook To protect your hard 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 Changing timeout settings and creating power schemes Unsaved data if the notebook battery runs down completelyUsing Battery Power To check battery statusTo respond to a low-battery warning To recharge the batteryTo get the most from your batteries Using Battery Power Modem and Network Connections Using the Modem Your telephone line type prior to connecting your phone lineTo change your modem settings Special restrictions in certain countriesConnecting 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 Turning on Bluetooth communication Making Wireless Bluetooth Connections select models onlyTo turn Bluetooth communication on and off FunctionTo prepare for Bluetooth connections Turning off Bluetooth communicationTo 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 CardsInserting a PC Card Connecting External Devices Audio recorder These jacks may damage the notebookAudio ports on your notebook Connecting an external monitor Adjusting monitor resolution and other settingsTo use an external monitor Using dual display mode To connect an Ieee 1394 device select models onlyPrinting to an infrared printer Using the infrared portTo connect an infrared device select models only Transferring files through an infrared connectionTo use a port replicator select models only To dock to the port replicator Corresponding port on the port replicator is ignoredTo undock from the port replicator Installing Additional RAM Memory To install a RAM expansion moduleBack of the notebook Installing Additional RAM Memory To remove a RAM expansion module Installing Additional RAM Memory Replacing the Hard Drive To replace the hard driveTo replace the hard drive holder To prepare a new hard drive Troubleshooting and Maintenance If no sound is audible Troubleshooting Your NotebookAudio problems If sound does not recordIf you get a Region Code error when playing a DVD movie CD-ROM and DVD problemsIf you can’t boot from a CD or DVD If a DVD plays erraticallyDisplay problems Hard drive problems Heat problemsInfrared problems Keyboard and pointing device problemsIf the built-in network adapter doesn’t connect to the LAN Local area network LAN problemsIf a PS/2 scroll mouse doesn’t work If you can’t log in to Netware serversMemory problems Modem problemsIf the modem dials but doesn’t connect If the modem doesn’t dial or no dial tone is detectedIf the modem dials incorrectly If the modem isn’t detectedIf the modem connects, but transferred data is bad If the modem causes an Error messageIf the modem dials but you can’t hear it If the modem doesn’t faxPC Card Pcmcia problems Performance problemsIf the notebook turns off immediately after it turns on Power and battery problemsIf the notebook stops responding If the notebook keeps beepingIf the battery does not charge If the Time Remaining for the battery is not correctIf the notebook has a short operating time Printing problems If a serial modem does not work properly Serial, parallel, and USB problemsIf a serial mouse doesn’t work If the serial or parallel port is not workingStartup problems Wireless problems If you have problems with wireless 802.11 communicationIf your notebook cannot detect any Bluetooth devices If your notebook cannot detect a certain Bluetooth deviceIf you can connect, but the network is slow Configuring the Notebook To run the Bios Setup utilitySetting Description Default Main MenuSecurity Menu To change video memory settings using Bios Setup utility Reinstalling and Updating Software To replace a damaged QuickRestore System Recovery CDReference Information Command Conexant Modem Reference InformationModem Reference Conexant G,h,i G,h +MCR ECC Commands AT* Commands +FMRRegister Function Conexant Range/units Default Code MeaningSafety Information Power cordsCountry or Region Rated Voltage and Current Battery safety Laser safetyLED safety Mercury safetyExposure to radio frequency radiation Regulatory Information Connections to Peripheral DevicesRegulatory Information Responsible Party CanadaDeclaration of Conformity U.S.A Trade nameEuropean Union Regulatory Information Japan Japan Telecommunications ApprovalNew Zealand Conexant AMC20493-KT5 Data Fax Modem PTC 211/02/071Russia International EMC Index QuickRestore System Recovery USB
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2547EA, 2552AI, 2541AH, 2543AH, 2542EA specifications

The HP 2135US is a versatile all-in-one desktop computer designed to meet the needs of home and small office users. This robust machine is particularly attractive for individuals who seek a blend of performance, aesthetics, and user-friendly features.

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