Manual de serviços Acer Travelmate 2350

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Manual de serviços Acer Travelmate 2350 | Manualzz

Chapter 4

Troubleshooting

System Check Procedures

External Diskette Drive Check

Do the following steps to isolate the problem to a controller, driver, or diskette. A write-enabled, diagnostic diskette is required.

NOTE: Make sure that the diskette does not have more than one label attached to it. Multiple labels can cause damage to the drive or cause the drive to fail.

Do the following to select the test device.

1.

The FDD heads can become dirty over time, affecting their performance. Use an FDD cleaning kit to clean the heads. If the FDD still does not function properly after cleaning, go to next step.

2.

Boot from diagnostic program.

3.

If an error occurs with the internal diskette drive, reconnect the diskette connector on the main board.

If the error still remains:

1.

Reconnect the external diskette drive module.

2.

Replace the external diskette drive module.

3.

Replace the main board.

External CD-ROM/DVD-ROM Drive Check

Do the following to isolate the problem to a controller, drive, or CD-ROM/DVD-ROM. Make sure that the CD-

ROM does not have any label attached to it. The label can cause damage to the drive or can cause the drive to fail.

Do the following to select the test device:

1.

Insert an audio CD into the CD/DVD drive. If the CD/DVD drive can read the data from the audio CD. The drive does not have problem, then go to next step. If the CD/DVD LED on the front panel does not emit light as it read the data from the audio CD, then go to next step. However, if the CD/DVD drive can not read data from the audio CD, you may need to clean the CD/DVD drive with a CD/DVD drive cleaning disk.

2.

Make sure that the appropriate driver has been installed on the computer for the CD/DVD drive.

3.

Boot from the diagnostics diskette and start the diagnostics program

4.

See if CD-ROM Test is passed when the program runs to CD-ROM/DVD-ROM Test.

5.

Follow the instructions in the message window.

If an error occurs, reconnect the connector on the main board. If the error still remains:

1.

Reconnect the CD-ROM/DVD-ROM module.

2.

Replace the CD-ROM/DVD-ROM module.

3.

Replace the main board.

Chapter 4 50

Keyboard or Auxiliary Input Device Check

Remove the external keyboard if the internal keyboard is to be tested.

If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable extending from the keyboard is correctly seated in the connector on the main board.

If the keyboard cable connection is correct, run the Keyboard Test.

If the tests detect a keyboard problem, do the following one at a time to correct the problem. Do not replace a non-defective FRU:

1.

Reconnect the keyboard cables.

2.

Replace the keyboard.

3.

Replace the main board.

The following auxiliary input devices are supported by this computer:

!

!

Embedded Numeric Keypad

External keyboard

If any of these devices do not work, reconnect the cable connector and repeat the failing operation.

Memory Check

Memory errors might stop system operations, show error messages on the screen, or hang the system.

Currently, we do not provide memory test program. However, if you need to check memory but have no testing program or diagonositc utility at hand, please go to http://www.passmark.com to download the shareware

“BurnIn Test V.3.0”. You may test the memory with this program under Window XP environment.

NOTE: Make sure that the DIMM is fully installed into the connector. A loose connection can cause an error.

Power System Check

To verify the symptom of the problem, power on the computer using each of the following power sources:

1.

Remove the battery pack.

2.

Connect the power adapter and check that power is supplied.

3.

Disconnect the power adapter and install the charged battery pack; then check that power is supplied by the battery pack.

51 Chapter 4

Check the Power Adapter

Unplug the power adapter cable from the computer and measure the output voltage at the plug of the power adapter cable. See the following figure

Pin 1: 19V

Pin 2: 0V, Ground

1.

If the voltage is not correct, replace the power adapter.

2.

If the voltage is within the range, do the following:

!

!

Replace the main board.

If the problem is not corrected, see “Undetermined Problems” on page 60.

!

If the voltage is not correct, go to the next step.

NOTE: An audible noise from the power adapter does not always indicate a defect.

3.

If the DC-IN indicator does not light up, check the power cord of the power adapter for correct continuity and installation.

4.

If the operational charge does not work, see “Check the Power Adapter” on page 52.

Chapter 4 52

Check the Battery Pack

To check the battery pack, do the following:

From Software:

1.

Check out the Power Options in control Panel

2.

In Power Meter, confirm that if the parameters shown in the screen for Current Power Source and Total

Battery Power Remaining are correct.

3.

Repeat the steps 1 and 2, for both battery and adapter.

4.

This helps you identify first the problem is on recharging or discharging.

From Hardware:

1.

Power off the computer.

2.

Remove the battery pack and measure the voltage between battery terminals 1(+) and 6(ground).

3.

If the voltage is still less than 7.5 Vdc after recharging, replace the battery.

4.

If the voltage is within the normal range, run the diagnostic program.

To check the battery charge operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

If the battery status indicator does not light up, remove the battery pack and let it return to room temperature.

Re-install the battery pack.

If the charge indicator still does not emit, replace the battery pack. If the charge indicator still does not light up, replace the DC/DC charger board.

Touchpad Check

If the touchpad doesn’t work, do the following actions one at a time to correct the problem. Do not replace a non-defective FRU:

1.

After rebooting, run Touch pad/PS2 Mode Driver.

2.

Run utility with the PS/2 mouse function and check if the mouse is working.

3.

If the PS/2 mouse does not work, then check if the main board to switch board FPC is connected well.

4.

If the main board to switch board FPC is connected well, then check if the touch pad FPC connects to the main board properly.

5.

If there is still an error after you have connected the touch pad FPC to the main board properly, then replace the touch pad or touch pad FPC. The touch pad or touch pad FPC may be damaged.

6.

Replace switch board.

7.

If the touch pad still does not work, then replace the FPC on Track Pad PCB.

After you use the touchpad, the pointer drifts on the screen for a short time. This self-acting pointer movement can occur when a slight, steady pressure is applied to the touchpad pointer. This symptom is not a hardware problem. No service actions are necessary if the pointer movement stops in a short period of time.

Display Check

1.

Connect an external display to the computer’s external monitor port, the boot the computer. The computer can automatically detect the external display. Press Fn+ p to switch to the external display.

2.

If the external display works fine, the internal LCD may be damaged. Then perform the following steps:

Make sure the DDRRAM module is seated properly. Then run the diplay test again. If the problem still exists, go to next step.

Replace the inverter board, then run the display test program again. If the problem still occurs, go on next step.

Replace the LCD module with a new one then run the display test again. If the probelm still happens, continue next step.

Replace LCD/FL cable with a new one then execute the display diagnostic again. If the problem

53 Chapter 4

still occurs, continue next step.

Replace the CPU with another of the same specifications. If the problems still occurs, go to next step.

The main board may be damaged. Replace main board.

3.

If the external monitor has the same problem as the internal monitor, the main board may be damaged.

Please insert the diagnostic disk and run the display test program and go through the sub-steps under step 2.

Sound Check

To determine if the computer’s built-in speakers are functioning properly, perform the following steps. Before you start the steps below, adjust the speaker volume to an appropriate level.

1.

Try different audio sources. For example, employ audio CD and ditital music file to determine whether the fault is in the speaker system or not. If not all sources have sound problem, the problem is in the source devices. If all have the same problem, continue next step.

2.

Connect a set of earphone or external speakers. If these devices work fine, go to next step. If not, then the main board may be defective or damaged. Replace the main board.

3.

Follow the disassembling steps in Chapter 3. Esure the speaker cable is firmly connected to the main board. If the speaker is still a malfunction, go on next step.

4.

If the speakers do not sound properly, the speakers may be defective or damaged. Replace the speakers.

If the problem still occurs, then replace the main board.

Chapter 4 54

Insyde MobilePro BIOS POST Beep Code and POST Messages

The POST error message index lists the error message and their possible causes. The most likely cause is listed first.

NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU replacement does not solve the problem, put the original part back in the computer. Do not replace a non-defective FRU.

This index can also help you determine the next possible FRU to be replaced when servicing a computer.

If the symptom is not listed, see “Undetermined Problems” on page 60.

The following lists the error messages that the BIOS displays on the screen and the error symptoms classified by function.

NOTE: Most of the error messages occur during POST. Some of them display information about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, such as the way it has been configured.

NOTE: If the system fails after you make changes in the BIOS Setup Utility menus, reset the computer, enter

Setup and install Setup defaults or correct the error.

Beep Code

short, short, short; short, short, long short, short, short; short, long, short short, short, short; short, long, long

Message

“FAULTY DMA PAGE REGISTERS”

“FAULTY REFRESH CIRCUIT”

“ROM CHECKSUM INCORRECT” short, short, short; long, short, short short, short, short; long, short, long

“CMOS RAM TEST FAILED”

“DMA CONTROLLER FAULTY” short, short, short; long, long short short, short, short; long, long, long

“INTERRUPT CONTROLLER

FAILED”

N/A short, short, long; short, short, short short, short, long; short, short, long

N/A

N/A

N/A

N/A

N/A

N/A

N/A

Description

DMA page registers do not function properly.

RAM refresh circuit does not function properly.

BIOS ROM checksum failed.

CMOS RAM test failed.

DMA controller does not work properly.

The interrupt controller does not work properly.

Keyboard controller failed to respond with the self-test command.

No video device found.

No RAM installed.

“KEYBOARD CONTROLLER

FAILURE”

“KEYBOARD FAILURE”

“CMOS FAILURE - RUN SCU”

Keyboard controller failed during system inquiry about connected devices.

The keyboard fails to respond or no keyboard is connected.

CMOS data error, probably due to battery power loss.

“CMOS CHECKSUM INVALID - RUN

SCU”

“RAM ERROR AT LOCATION

xxxxxx:

CMOS checksum error.

The RAM failed during memory test at the indicated location.

WROTE: xxxx

READ: xxxx”

55 Chapter 4

N/A

Beep Code

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

Message

“PARITY ERROR AT

UNKNOWN

Description

Parity error during memory test at unknown location.

LOCATION”

“PARITY ERROR AT LOCATION

XXXXXX”

“NO INTERRUPTS FROM TIMER 0”

Parity error during memory test at the indicated location.

Timer 0 of the clock timer controller does not generate system interrupts correctly.

“UNEXPECTED AMOUNT OF

MEMORY - RUN SCU”

The system memory size does not match with the CMOS record.

“CLOCK NOT TICKING CORRECTLY” The system clock does not working correctly.

“TIME/DATA CORRUPT - RUN SCU” The time/date information in CMOS is invalid.

“MACHINE IS LOCKED - TURN KEY” The keyboard operation is locked.

“BOOT SECTOR 0 HAS CHANGED” The boot sector of the hard disk has been changed, probably because of a virus attack.

Suspend-to-Disk partition MISSING!” No Suspend-to-Disk partition found.

“Hard Disk ERROR!” Access to the Suspend-to-Disk partition failed.

No Suspend-to-Disk partition signature found.

“Suspend-to-Disk partition signature

NOT FOUND!”

“Suspend-to-Disk partition size TOO

SMALL!”

“MEMORY SIZE HAS CHANGED --

REBOOTING”

The capacity of the Suspend-to-Disk partition is not enough.

The memory size has changed after previous

Suspend-to-Disk operation.

Chapter 4 56

Index of Symptom-to-FRU Error Message

LCD-Related Symptoms

Symptom / Error

LCD backlight doesn't work

LCD is too dark

LCD brightness cannot be adjusted

LCD contrast cannot be adjusted

Unreadable LCD screen

Missing pels in characters

Abnormal screen

Wrong color displayed

LCD has extra horizontal or vertical lines displayed.

Action in Sequence

Enter BIOS Utility to execute “Load Setup Defaults” on Exit screen, then reboot system.

Reconnect the LCD connectors.

Keyboard (if contrast and brightness function key doesn't work).

LCD cable

LCD inverter

LCD

Main board

Reconnect the LCD connector

LCD cable

LCD inverter

LCD

Main board

LCD inverter

LCD cable

LCD

Main board

Indicator-Related Symptoms

Symptom / Error

Indicator incorrectly remains off or on, but system runs correctly

Action in Sequence

Reconnect the inverter board

Inverter board

Main board

Power-Related Symptoms

Symptom / Error

Power shuts down during operation

The system doesn’t power-on.

The system doesn’t power-off.

Battery can’t be charged

Action in Sequence

Power source (battery pack and power adapter). See “Power

System Check” on page 51.

Battery pack

Power adapter

Hard drive & battery connection board

Main board

Power source (battery pack and power adapter). See “Power

System Check” on page 51“.

Battery pack

Power adapter

Hard drive & battery connection board

Main board

Power source (battery pack and power adapter). See “Power

System Check” on page 51.

Hold and press the power switch for more than 4 seconds.

Main board

See “Check the Power Adapter” on page 52.

Battery pack

Main board

57 Chapter 4

PCMCIA-Related Symptoms

Symptom / Error

System cannot detect the PC Card (PCMCIA)

PCMCIA slot pin is damaged.

PCMCIA slot assembly

Main board

PCMCIA slot assembly

Action in Sequence

Memory-Related Symptoms

Symptom / Error

Memory count (size) appears different from actual size.

DIMM

Main board

Action in Sequence

Speaker-Related Symptoms

Symptom / Error

In Windows, multimedia programs, no sound comes from the computer.

Action in Sequence

See “Sound Check” on page 54

Audio driver

Speaker

Main board

Internal speakers make noise or emit no sound.

See “Sound Check” on page 54

Speaker

Main board

Power Management-Related Symptoms

Symptom / Error

The system will not enter hibernation

The system doesn't enter hibernation mode and four short beeps every minute.

Action in Sequence

Keyboard (if control is from the keyboard)

Hard disk drive

Main board

Press Fn+F4 and see if the computer enters hibernation mode.

Touchpad

Keyboard

Hard disk connection board

Hard disk drive

Main board

The system doesn’t enter standby mode after closing the LCD

The system doesn't resume from hibernation mode.

The system doesn't resume from standby mode after opening the LCD.

LCD cover switch

Main board

Hard disk connection board

Hard disk drive

Main board

LCD cover switch

Main board

Battery fuel gauge in Windows doesn’t go higher than 90%.

System hangs intermittently.

Remove battery pack and let it cool for 2 hours.

Refresh battery (continue use battery until power off, then charge battery).

Battery pack

Main board

Reconnect hard disk drives.

Hard disk drive connector

Main board

Chapter 4 58

59

Peripheral-Related Symptoms

Symptom / Error

System configuration does not match the installed devices.

External display does not work correctly.

USB does not work correctly

Print problems.

Action in Sequence

Enter BIOS Setup Utility to execute “Load Setup defaults”, then reboot system.

Reconnect hard disk/CD-ROM/diskette drives.

See if there is an error beep. If there is an erro beep, then change main board.

Power off. Then check if RAM CPU BIOS are well-connected.

Press Fn+F5 three times slowly

LCD FPC

LCD inverter

LCD

USB device cable is firmly connected into the USB ports. Test one

USB port each time.

USB socket is firmly secured to the main board.

Main board

Ensure the “Parallel Port” in the “System Devices” of BIOS Setup

Utility is set to Enabled.

Onboard Devices Configuration

Run parallel port test

Printer driver

Printer cable

Printer

Main board

Keyboard/Touchpad-Related Symptoms

Symptom / Error

Keyboard (one or more keys) does not work.

Touchpad does not work.

Action in Sequence

Reconnect the keyboard cable.

Keyboard

Main board

Reconnect touch pad cable. Modem port is secured to the main board

Touch pad FPC

Audio/Touch pad board

Main board

Modem-Related Symptoms

Symptom / Error

Internal modem does not work correctly.

Action in Sequence

Ensure the telephone cable is firmly plugged into the telephone wall socket and the modem port of the computer.

Modem phone port is secured to the main board.

modem combo board

Main board

NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined

Problems” on page 60.

Chapter 4

Undetermined Problems

The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, whether a short circuit is suspected, or whether the system is inoperative.

Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).

NOTE: Verify that all attached devices are supported by the computer.

NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power

System Check” on page 51):

1.

Power-off the computer.

2.

Visually check them for damage. If any problems are found, replace the FRU.

3.

Remove or disconnect all of the following devices:

!

Non-Acer devices

!

!

!

!

Printer, mouse, and other external devices

Battery pack

Hard disk drive

DIMM

!

!

CD-ROM/Diskette drive Module

PC Cards

4.

Power-on the computer.

5.

Determine if the problem has changed.

6.

If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.

7.

If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:

!

!

Main board

LCD assembly

Chapter 4 60

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