Maintenance & Service Guide, Solving Minor Problems

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 Without Diagnostics

Solving Minor Problems

Some minor problems and possible solutions are outlined in the following tables. If the problem appears related to a software application, check the documentation provided with the software.

Solving Audio Problems

Some common audio problems and solutions are listed in the following table.

Solving Audio Problems

Problem

Computer does not beep after the Power-On Self-Test (POST).

Probable Cause	Solution(s)
This is typical; it indicates successful	No action is required.
completion of the Power-On Self-Test
(POST).

Solving Battery Pack and Battery Gauge Problems

Some common causes and solutions for battery pack problems are listed in the following table. The "Solving Power Problems" section in this chapter may also be applicable.

Solving Battery Pack and Battery Gauge Problems

Problem	Probable Cause	Solution(s)
Computer won't turn on when battery	Battery pack is discharged.	Connect the computer to an external
pack is inserted and power cord is		power source and charge the battery
unplugged.		pack.
		Replace the battery pack with a fully
		charged battery pack.
		Check the battery connectors on the
		system board to verify they are evenly
		spaced and that they are not bent or
		broken.
Computer is beeping and battery LED	Battery charge is low.	Immediately save any open file(s). Then
icon is blinking.		do any one of the following:
		●	Connect the computer to an
			external power source to charge
			the battery pack.
		●	Turn off the computer or initiate
			Hibernation until you can find
			another power source or charge
			the battery pack.

Computer battery LED icon (front on the Volume is turned down too low. unit) blinks to indicate low battery

condition, but computer does not beep.

Battery LED icon doesn't light and	Battery pack is already charged.
battery pack won't fast charge.

Battery pack was exposed to temperature extremes.

Battery pack is at end of its life.

You have to set the date and time every RTC battery is dead. time you turn on the computer.

Problem	Probable Cause
Battery charge does not last as long	Battery is being exposed to high
as expected.	temperatures or extremely cold
	temperatures.

Adjust the volume.

No action is necessary.

Allow time for the battery pack to return to room temperature.

Replace battery pack. Replace the RTC battery.

Solution(s)

Keep the battery pack within the recommended operating temperature range 50° F to 104° F (10° C to

40° C) or recommended storage range - 4° F to 86° F (-20° C to

30° C ). Recharge the battery pack.

Battery pack is warm to the touch after charging.

Battery pack operating time is far less than the documented average operating time.

Battery has partially self-discharged.	Recharge the battery. Discharge the
	battery completely and then recharge it.
Power management is disabled.	Set a power management level in
	Computer Setup.
An external device or PC Card is draining	Turn off or disconnect external devices
the battery.	when not using them.
Normal warming has occurred due to	No action is required.
charging.
Power management is turned off or	Enable power management in Computer
disabled.	Setup and in Windows Power Properties.

An external device or PC Card is draining the battery.

Battery pack has partially self- discharged.

Battery pack is being exposed to high temperatures or extremely cold temperatures.

Turn off or disconnect external devices when not using them.

Condition the battery pack by fully charging, fully discharging, then fully recharging it.

To maintain the charge, leave battery packs in the computer when it is connected to external power.

If the computer is disconnected from external power for more than two weeks, remove battery packs from the computer to reduce the discharge rate.

Keep the battery pack within the recommended temperature ranges. Operating: 50° F to 104° F

(10° C to 40° C) Storage: -4° F to 86° F (-20° C to 30° C )

Recharge the battery pack.

Solving CD Drive Problems

Some common causes and solutions for CD drive problems are listed in the following table.

Solving CD Drive Problems

Problem

Probable Cause

Solution(s)

CD drive cannot read a compact disc.

Compact disc is upside down or is improperly inserted in the CD drive.

Open the CD loading tray, lay the compact disc in it (label side up), then close the tray.

CD is CD Plus or Pregap/Track 0 type. Cannot read these type CDs in 24x.

Remove the CD.

Solving Diskette and Diskette Drive Problems

Some common causes and solutions for diskette and diskette drive problems are listed in the following table.

Solving Diskette and Diskette Drive Problems

Problem

Probable Cause

Solution(s)

Diskette drive cannot write to a diskette. Diskette is write-protected.

Disable the diskette's write-protect feature or use a diskette that is not write-protected.

Diskette drive cannot read a diskette.

Cannot boot from diskette.

Computer is writing to the wrong drive.

Not enough space is left on the diskette.

Drive error has occurred.

Diskette is not formatted.

The wrong type of diskette is being used.

Diskette has a bad sector.

Drive error has occurred.

Diskette is not formatted.

Bootable diskette is not in drive A.

Diskette Boot has incorrect setting in Computer Setup.

Check the drive letter in the path statement.

Use another diskette.

Run Computer Checkup from the Compaq Diagnostics diskette.

Format the diskette. At the system prompt, enter FORMAT A:

Use the type of diskette required by the drive.

Copy files to hard drive or another diskette. Reformat bad floppy.

Run Computer Checkup from the Compaq Diagnostics diskette.

Format the diskette. At the system prompt, enter FORMAT A:

Put the bootable diskette in drive A.

Run Computer Setup and set diskette as first to boot.

Solving Display Problems

This section lists some common causes and solutions for computer display and external monitor problems.

You can perform a monitor self-test on an external VGA color or monochrome monitor by disconnecting the monitor from the computer. To do so, complete the following steps:

1.Turn off the monitor.

2.Turn off the computer.

3.Disconnect the monitor signal cable from the computer.

4.Turn on the monitor and allow it to warm up for one minute.

The display should be white. A narrow black border may also appear on the left and right sides of the display. Either of these displays indicates that the monitor is working properly.

Solving Display Problems

Problem	Probable Cause
Screen is dim.	Control for brightness or contrast (if
	applicable) is not set properly.

	Computer screen is in direct light.
Screen is blank.	Screen save was initiated by Power
	Management due to lack of user
	activity.

Solution(s)

Adjust the Brightness of the display by using Fn + F7 (¯ ) or

Fn + F8 (- ).

Adjust the Contrast of the display by using Fn + F5 (¯ ) or

Fn + F6 (- ).

Tilt display or move computer.

Press any key or touch the Touch Pad.

	Display has overheated.	If computer is in direct sunlight, move it
		and allow it to cool off.
Display is blank and the Suspend icon is	System is in Suspend mode.	Press any key or touch the Touch Pad.
flashing.
Internal display is blank and the screen	Display function was switched to the	Use Fn + F2 to switch between LCD or
on an external monitor displays	external monitor.	CRT.
information.

Problem

Probable Cause

Solution(s)

Internal display flashes or has garbled characters when computer is connected to external monitor.

Using 1024 × 768 or higher	Restart the computer.
resolution on external monitor
and have toggled back to
internal display, which
supports up to
800 × 600.

The light tubes on the edge of the display panel	Improper backlight or display	Replace the display assembly.
do not light up at all and Power-On Self-Test	cable connections
(POST) completes when the unit is powered
up.**
	Defective inverter board.	Replace the display assembly.
	Defective display cable.	Replace the display assembly.
	Defective display panel.	Replace the display assembly.
	Defective system board.	Replace the system board.
The light tubes on the edge of the display panel	Defective system board.	Replace the system board.
do not light up at all and Power-On Self-Test
(POST) does not complete when the unit is
powered up.**
Backlight (brightness) cannot be adjusted with	Improper display cable	1. Reseat the display cable to the
Fn + F7 (¯ ) or	connections.	system board.
Fn + F8 (- ).***
		2. Replace the display assembly.
	Defective inverter board.	Replace the display assembly.
	Defective display cable.	Replace the display assembly.
	Defective system board.	Replace the system board.
Contrast cannot be adjusted with	Improper display cable	1. Reseat the display cable to the
Fn + F5 (¯ ) or Fn + F6 (- ).	connections.	system board.
		2. Replace the display assembly.

Defective inverter board.

Defective display cable. Defective system board.

Replace the display assembly.

Replace the display assembly. Replace the system board.

**This problem indicates that the backlight or its power circuitry has failed. Since you cannot observe the POST result on the display panel when the backlight is not functioning, connect the unit to an external monitor before powering the unit up. If an external monitor is not available, verify that POST completes by opening and closing the display, listening for the single or double beep, and watching for the LEDs turn on at the front of the computer.

Problem

This display panel has a continuous pattern across it (e.g., a "jailbars" pattern), has a single color on it, or has garbled graphics across the entire panel. This failure is for patterns across the entire panel (not just on one section).

Ghost bars extending from graphics on the display.

Probable Cause	Solution(s)
Improper display cable	Reseat the display cable to the following
connections	until the problem is solved:
	1.	System board
	2.	Display assembly
Defective display cable.	Replace the display assembly.
Defective inverter board.	Replace the display assembly.
Defective system board.	Replace the system board.
Common characteristic of STN	1.	Change the background colors.
displays.
	2.	Adjust the Contrast of the display by
	using Fn + F5 or Fn + F6 .

A single line, small group of lines, or block	Defective display panel.	Replace the display assembly.
appears on the display panel. This failure
occurs in only a section of the display panel.

To perform a "self-test" on an external VGA color or monochrome monitor, complete the following steps: The

NOTE: screen should be white. A narrow black border may also appear on the left and right sides of the display. Either of these displays indicates that the monitor is working properly.

Solving Hard Drive Problems

Some common causes and solutions for hard drive problems are listed in the following table.

CAUTION: To prevent loss of information, always maintain an up-to-date backup of your hard drive at all times, in case of errors or failures.

	Solving Hard Drive Problems
Problem	Probable Cause
Reading hard drive takes an unusually	System entered Hibernation due to
long time after restarting the computer.	low battery condition and is now
	exiting from it.
Hard drive error occurs.	Hard drive has bad sectors or has
	failed.
Hard drive does not work.	Hard drive is not seated properly.

Solution(s)

Give the system time to restore the previously saved data to its exact state before Hibernation.

Run Computer Checkup.

Turn off and unplug the computer, remove the battery pack, and remove and then reinstall the hard drive.

Solving Hardware Installation Problems

Some common causes and solutions for hardware installation problems are listed in the following table.

Solving Hardware Installation Problems

Problem

A new device is not recognized as part of the computer system.

Probable Cause

Cable(s) of new external device are loose or power cables are unplugged.

Solutions(s)

Ensure that all cables are properly and securely connected.

Power switch of new external device is not turned on.

Turn off the computer, turn on the external device, then turn on the computer to integrate the device with the computer system.

Device is not seated properly.

Turn off the computer and reinsert the device.

Solving Keyboard/Numeric Keypad Problems

Some common causes and solutions for keyboard/numeric keypad problems are listed in the following table.

Solving Keyboard/Numeric Keypad Problems

Problem	Probable Cause	Solution(s)
Embedded numeric keypad on computer	Num Lock function is not enabled.	Press the Shift+NumLk keys to
keyboard is disabled.		enable the Num Lock function and
		embedded numeric keypad. The Num
		Lock icon on the status panel turns
		on.
Embedded numeric keypad is disabled and	External numeric keypad is	Disconnect the external numeric
Num Lock function is on.	connected to the computer.	keypad from the computer.

Solving Memory Problems

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

Solving Memory Problems

Problem	Probable Cause	Solution(s)
Memory count during Power-On Self-Test	Optional memory expansion card	Ensure that the optional memory
(POST) is incorrect.	is installed incorrectly,	expansion card is installed correctly.
	is incompatible with the computer, or
	is defective.

"Out of Memory" message is displayed on the	System ran out of memory for the	Check the application documentation
screen or insufficient memory error occurs	application.	for memory requirements.
during operation.
		Install additional memory.

Too many TSR (terminate-and stay- resident) applications are running.

Remove from memory any TSR applications that you do not need.

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.

One of the standout features of the HP 1278 and 1277 is their ability to produce vibrant, sharp images. Both models utilize HP's innovative Inkjet technology, which ensures precise ink placement for stunning photo prints and clear text documents. The printers support various media types, from standard paper to photo paper, catering to a wide range of printing needs.

Connectivity is a crucial aspect of modern printers, and HP has ensured that the 1278 and 1277 excel in this area. Both printers offer wireless printing capabilities, allowing users to print from smartphones, tablets, and laptops without the hassle of tangled cords. They support various connectivity options, including Wi-Fi Direct and mobile printing via the HP Smart app, which enhances user convenience.

Speed is another critical feature of the HP 1278 and 1277. These models are designed to handle high-volume printing tasks efficiently, boasting impressive print speeds that can significantly reduce waiting times for essential documents. The fast output does not come at the expense of quality; users can expect crisp and clear text, along with rich colors in all their prints.

In terms of user-friendliness, both models are equipped with intuitive control panels and clear LCD displays that make navigation easy. They also come with easy-to-install cartridges, enabling quick replacements, minimizing downtime, and maximizing productivity.

The HP 1278 and 1277 models also emphasize sustainability. HP has integrated EcoSmart technology into these printers, which helps reduce energy consumption and waste. Users can take advantage of HP Instant Ink, a subscription service that delivers ink cartridges to their door when supplies run low, promoting a more sustainable approach to printing.

Overall, the HP 1278 and 1277 are versatile printers that blend high performance with user-friendly features. Their combination of advanced technologies, connectivity options, speed, and quality make them ideal choices for anyone looking to enhance their printing experience, whether at home or in a professional setting. These models represent HP's commitment to delivering reliable and efficient printing solutions for diverse user needs.