HP 1277, 1278 manual Solving Power Problems

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Maintenance & Service Guide

Presario Series

Models: 1246, 1247, 1277, 1278, and 1279

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

Troubleshooting

Solving PC Card Problems

Some common causes and solutions for PC Card problems are listed in the following table.

Solving PC Card Problems

Problem

Probable Cause

Solution(s)

When turned on, the computer does not beep when a PC Card is inserted.

Card is not inserted properly.

PC Card beeps are disabled.

Ensure the card is inserted in the correct orientation.

Double-click the PC Card icon in the Control Panel, and click the Global Settings tab; then,

enable PC Card sound effects.

Speaker is turned off or

Press volume buttons to turn

volume is turned down.

the speaker on; then, increase the

 

volume.

PC Card modem, fax, or network card does not work.

PC Card drivers are not installed.

Card or card driver is not supported.

Card is not fully inserted into the slot or is not inserted properly.

Double click the Add New Hardware icon in the Control Panel for installation instructions.

If PC Card or drivers are not compatible with Windows, install drivers and use the PC Card in MS-DOS mode.

Contact your Compaq-authorized

service provider for a list of PC Cards tested successfully in Compaq PC Card platforms.

Ensure that the card is inserted in the correct orientation.

 

Telephone cord is not

Check and secure telephone

 

plugged in all the way.

connection.

 

Necessary drivers are not

Install drivers.

 

installed (turned on).

 

PC Card modem or fax card

You are trying to access the

See Specifications to verify

does not work.

card using the wrong COM

COM port.

 

port.

 

 

The card conflicts with a

See Specifications to verify

 

serial device.

address.

 

The card is not supported.

Use supported cards only.

Modem network PC Card does

Network driver is not

Install driver.

not work.

installed or is not set up

 

 

properly.

 

Memory or storage card does not work.

Telephone cord is not properly connected.

SRAM and flash memory cards require the memory card driver to be loaded (turned on).

Flash memory cards require the Microsoft FlashFile System to be loaded.

Hard drives on flash

mass storage cards require the PC Card ATA driver to be loaded.

You are trying to access the hard drive card using the wrong drive letter.

The card is not supported.

Verify telephone connection. Install driver.

Double-click My Computer to verify the drive letter assigned to the card.

Contact your Compaq authorized service provider for a list of PC Cards tested successfully in Compaq PC Card platforms.

Solving Power Problems

 

Solving Power Problems

Problem

Probable Cause

Solution(s)

Computer won't turn on and battery pack is not inserted.

Computer turned off while it was left unattended and the power icon is off.

Computer is not connected to a power source.

Power cords to the external power source are unplugged.

Power adapter is defective.

System board is defective.

System initiated Hibernation due to a critical low-battery condition.

System initiated Hibernation after a preset timeout.

Insert battery or connect an external power source.

Ensure that power cords connecting the computer and the external power source are plugged in properly.

Replace AC Adapter and restart.

Replace the system board.

Replace the battery pack with a fully charged battery pack or connect the computer to an external power source. Then turn on the computer.

Turn on the computer.

Solving Printer Problems

If you experience problems printing, run a printer self-test. Refer to the documentation provided with your printer for instructions. If the self-test fails, it is a printer-specific problem. Also refer to the printing section of your application documentation.

Solving Printer Problems

Problem

Printer will not turn on.

Printer will not print.

Probable Cause

The signal cable may not be connected properly, or the printer is unplugged.

Printer is not turned on or is off line.

The device drivers for your application are not installed.

Printer that is set up for a network is not connected to the network.

Printer cable is too long, unshielded, or defective.

Solution(s)

Ensure that the signal cable is properly connected and that the power cord is connected to the electrical outlet.

Turn the printer on and set it to on line.

Refer to the printer documentation to install the correct printer driver.

Connect the printer to the network.

Replace the cable.

Paper tray is empty.

Printer prints garbled information.

Correct printer drivers

 

are not installed.

Cable is not connected properly.

Cable is defective.

Fill the paper tray with paper and set the printer to online.

Refer to the printer documentation to install the correct printer driver.

Ensure that the printer signal cable is properly connected to the computer.

Replace the printer cable and retest.

Solving Touch Pad/Pointing Device Problems

Some common causes and solutions for Touch Pad/pointing device problems are listed in the following table.

Solving Touch Pad/Pointing Device Problems

Problem

Cause

Solution(s)

Touch Pad or mouse does not work.

External mouse does not work.

Touch Pad or mouse does not work even though the device is enabled in Windows.

Cursor skips or moves abnormally when using the Touch Pad.

Incorrect device drive, or no device driver is installed.

The device driver is not installed in Windows.

Mouse is not securely connected or is connected to an incorrect external connector.

Mouse is not enabled.

Cable not properly seated in Touch Pad board.

Defective Touch Pad board.

Defective system board.

Device driver is not correctly installed in Windows.

The Touch Pad needs to be cleaned.

Install the device driver and add to the AUTOEXEC.BAT file or CONFIG.SYS file.

Install the Touch Pad/mouse driver in Windows.

Ensure that the mouse is securely connected to the appropriate external connector.

Enter MOUSE at the system prompt to activate the mouse device driver.

Add a line in the AUTOEXEC.BAT file to automatically activate the mouse device driver each time computer is turned on or restarted.

Reseat cable.

Replace Touch Pad board.

Replace system board.

Install the appropriate device driver in Windows.

Clean the Touch Pad with a cloth dampened with alcohol or an ammonia-based glass cleaner. Wipe up liquid with a dry cloth.

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Contents Page Compaq Computer Corporation Technician Notes PrefaceCompaq Presario Series Portable Computer is Product DescriptionMAH NiMH Models and FeaturesControls and Lights Front Bezel Lights Front Bezel Buttons Left Side Components Product DescriptionRight Side Components Bottom of Unit Rear Connectors Pow Power Management for WindowsFollow the Preliminary Steps Run the Power-OnSelf-Test Post TroubleshootingRun Computer Checkup Preliminary StepsCover with Touch Pad Clearing the Power-on PasswordRunning Post Power-On Self Test PostComputer Checkup Test Compaq DiagnosticsShipping Preparation Contacting Compaq SupportProcessor Test Error Codes Diagnostic Error CodesBefore Replacing Parts Troubleshooting Without DiagnosticsSolving Minor Problems Maintenance & Service GuideSolving Power Problems Illustrated Parts Catalog System Unit Mass Storage DevicesDescription Spare Part Number BoardsDisplay Assembly Mass Storage Devices Miscellaneous Cable Kit Spare Part Number Miscellaneous Cables KitMiscellaneous Hardware Kit Miscellaneous Hardware Kit Spare Part Number 346853-001Miscellaneous Plastics Kit Miscellaneous Parts Documentation and Software Feature GuideSerial Number Location Removal and Replacement ProceduresElectrostatic Discharge Removal and Replacement ProceduresService Considerations Removal and Replacement ProceduresCables Cables and ConnectorsCAU Back to Cables and Connectors Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Cable position for the speaker assembly Preparing the Computer for Disassembly Removal Sequence Removing the Battery PackRemoving the Battery Pack Removing the Palmrest Cover with Touch Pad Removing the Palmrest Cover with Touch Pad Removing the Keyboard Computer Removing the ProcessorTo replace the processor, complete the following steps Removing the ProcessorRemoving the Heatspreader Removing the 4.3-GB or 4.8- GB Hard Drive Removing the 4.3-GB or 4.8-GB Hard Drive Removing the 4.3-GB or 4.8-GB Hard Drive Removing the CD Drive Removal and Replacement Procedures Return to Removal Replacement Procedures Removing Battery Charger Board Removing the Modem Removing the Modem Removing Display Panel Assembly Display Panel AssemblyRemoving the Display Panel Assembly Close the display panel assembly and push back on Removal and Replacement Procedures Lvds Removing the Upper CPU Cover Removal and Replacement Procedures Memory Module Removing the Speaker AssemblyUpper CPU cover Removing Diskette DriveRemoving Fan Assembly Important the arrow located on Removing the Fan AssemblyElectrostatic Removing the System Board Removal and Replacement Procedures Remove two screws from the system board Removal and Replacement Procedures Return to Removal & Replacement Procedures Removing the Memory Module Removing the Memory Module Physical and Environmental SpecificationsPin Signal Connector Pin AssignmentsIncreasing Battery Pack Operating Time Battery Pack Operations
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1278, 1277 specifications

The HP 1278 and 1277 are modern printers designed to meet the evolving needs of both home and office environments. These models feature advanced printing technologies that enhance efficiency while delivering high-quality prints.

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