HP Book 4150 Power and Battery Problems, If the OmniBook turns off immediately after it turns on

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Troubleshooting

Solving Problems

Power and Battery Problems

If the OmniBook turns off immediately after it turns on

∙Battery power is probably extremely low. Plug in the ac adapter or insert a charged battery.

If the OmniBook keeps beeping

∙The OmniBook beeps for 15 seconds when the battery is low. Save your work, quit immediately, and insert a charged battery or plug in the ac adapter.

If the OmniBook has a short operating time

∙Try conserving power using any of the suggestions listed in the chapter titled “Managing Battery Power” in the online Reference Guide.

∙If you are running any applications with an automatic save feature, such as MS Word for Windows, disable this feature.

∙If the operating time has gotten shorter and the battery is more than a year or two old, you may need to replace the battery.

∙Turn down the display brightness (Fn+F1).

∙Heavy modem use can affect battery operating time.

∙For Windows 95, 98, and NT, check the Power Management settings in BIOS Setup.

1.From the Start menu, shut down, then restart the OmniBook.

2.When you see the HP logo, press F2 to enter the BIOS Setup utility.

3.From the Power menu, make sure the Power Management Mode is set to Maximum Power Savings.

4.Press F10 to Save and Exit the BIOS Setup utility.

∙For Windows 2000, check the settings in Control Panel, Power Options, on the Power Schemes tab.

If the battery doesn’t charge

∙Make sure the ac adapter is plugged into the power source.

∙If you’re using a power strip, remove the ac adapter from the power strip and plug it directly into a wall outlet.

78 User’s Handbook

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Contents HP OmniBook User’s Handbook User’s Handbook HP Software Product License Agreement Edition History Contents Configuring the OmniBook TroubleshootingExpanding the OmniBook Support and Service Specifications and Regulatory InformationIndex Page Introducing the OmniBook Getting More Information Description and LocationTaking Inventory Included in the OmniBook boxOmniBook Features OmniBook-Front ViewOmniBook-Side View OmniBook-Back View Setting Up for the First Time To set up the OmniBook and WindowsOr AT Their Local Microsoft Office Operating the OmniBook Starting and Stopping the OmniBook To start and stop the OmniBookTo reset the OmniBook To check power status and drive activity Checking the Status of the OmniBookUsing the OmniBook Pointing Devices To use the built-in pointing devices Using the OmniBook Display To adjust the display brightnessTo extend the life of the display On the Keyboard Adjusting the Audio SystemTo adjust the volume WindowsUsing the OmniBook Keyboard To use the Fn hot keysOmniBook Library To use the embedded keypad What is RSI? Working in ComfortAbout Repetitive Strain Injury What causes RSI? What can I do to avoid RSI?What if I experience discomfort? Preparing Your Work Environment Your ChairYour Work Surface Your Work PostureSetting Up Your HP Computing Equipment Your HP MonitorWorking in Comfort Monitor Use Specifications Document HoldersYour HP Keyboard Mice and Other Input Devices Working in Comfort Comfort and Safety Checklist Headphones and SpeakersGeneral Overall Using Your Mobile Computer Your HP OmniBook ComputerPreparing Your Mobile Work Environment Working in Comfort Page Managing Battery Power How Power is Managed Monitoring Battery Power To install APM for Windows NTOn the Battery To check the battery statusTo respond to a low-battery warning From the Windows TaskbarCharging time To recharge a batteryBattery life Optimum ChargingTo replace the battery AdapterTo install a second battery Safety onPage Expanding the OmniBook Using Plug-In Modules To install hot-swap supportTake proper action, you could lose data To replace a plug-in module Using Plug-In Modules Connecting External Devices To identify connectors for external devicesTo enable the built-in and external displays To connect an external monitorTo connect an external keyboard or PS/2 mouse To connect a printerUsing PC Cards To insert and remove a PC CardUsing PC Cards Installing a Hard Disk Drive To replace the hard disk driveInstalling a RAM Expansion Module Installing a RAM Expansion Module Configuring the OmniBook Using Bios Setup To run the Bios Setup utilityConfiguring Security Options To set or change an OmniBook passwordTo delete an OmniBook password To attach a security cable Page Troubleshooting If you can’t boot from a CD in a CD-ROM drive Solving ProblemsAccessory Problems If a port on a dock isn’t workingAudio Problems If a DVD drive locks up the computer in WindowsIf sound is not audible Display Problems If sound doesn’t recordIf the OmniBook is on, but the screen is blank If the screen is difficult to read If an external monitor doesn’t workIf multiple display support doesn’t work in Windows If the hard disk makes buzzing or whining noise Hard Disk Drive ProblemsIf the OmniBook’s hard drive doesn’t spin If files are corruptedIf the pointer is difficult to control Keyboard and Pointing Device ProblemsIf a special feature on the PS/2 mouse doesn’t work If the touch pad or pointing stick doesn’t workIf you can’t type the euro symbol If you have problems with infrared communicationsWindows NT 4.0 does not support infrared communication If a message says you are out of memory Memory Problems PC Card Pcmcia Problems If memory doesn’t increase after adding RAMIf an I/O card stops communicating properly Performance Problems If the OmniBook gets hotIf the OmniBook pauses or runs sluggishly If the OmniBook turns off immediately after it turns on Power and Battery ProblemsIf the battery doesn’t charge If the OmniBook keeps beepingIf the second battery doesn’t charge If the OmniBook stops respondingIf the OmniBook doesn’t suspend as expected Printing Problems If the OmniBook doesn’t automatically hibernate as expectedIf a serial or parallel printer doesn’t print If the left edge of printed output is missing Serial, Parallel, and USB ProblemsIf an infrared printer doesn’t print If the serial mouse doesn’t workIf a serial modem doesn’t work properly Startup ProblemsIf the OmniBook doesn’t boot from battery power If the USB port is not workingIf the OmniBook doesn’t boot from the floppy disk drive Testing the Operation To run the diagnostic testTo create a diagnostic floppy disk SpaceRecovering Software To recover the factory installation of Windows Page Support and Service Electronic Support Services Getting HP OmniBook AssistanceSupport Assistance Repair Assistance Customer Support CentersCentral/South America Hewlett-Packard Limited Warranty Statement Hewlett-Packard Limited Warranty Statement Specifications and Regulatory Information Hardware Specifications Bus ArchitectureRAM Environmental Limits Major ICs Safety Information Power CordsBattery Safety Laser SafetyLED Safety Regulatory Information Connections to Peripheral DevicesCanada JapanDeclaration of Conformity International AddressIndex APMConnecting, See Reference Guide location, 14 Configuring, See Reference Guide location User’s Handbook