Acer Travelmate 5000 Maintenance Manual

							Table 4-2  Self-Test Beep Codes (continued)
Beep Code Port 80h Description
2-3-3 1Ah Bit A, 1ST 64K RAM Failure
2-3-4 1Bh Bit B, 1ST 64K RAM Failure
2-4-1 1Ch Bit C, 1ST 64K RAM Failure
2-4-2 1Dh  Bit D, 1ST 64K RAM Failure
2-4-3 1Eh Bit E, 1ST 64K RAM Failure
2-4-4 1Fh Bit F, 1ST 64K RAM Failure
3-1-1 20h Slave DMA Register Failure
3-1-2 21h Master DMA Register Failure
3-1-3 22h  Master Interrupt Mask Register Failure
3-1-4 23h Slave Interrupt Mask Register Failure
None 25h Interrupt Vector Loading In Progress
3-2-4 27h Keyboard Controller Test Failure
None 28h CMOS Power Failure and Checksum in 
Progress
None 29h CMOS Configuration Validation in Progress
3-3-4 2Bh Screen Memory Test Failure
3-4-1 2Ch Screen Initialization Failure
3-4-2 2Dh Screen Retrace Test Failure
None 2Eh  Search for Video ROM in progress
None 30h Screen Believed Operable; running with 
Video ROM
None 31h Monochrome Monitor Believed Operable
None 32h Color Monitor (40 Column) Believed 
Operable
None 33h Color Monitor (80 Column) Believed Operable
4-2-1 34h No Time Tick
4-2-2 35h Shutdown Failure
4-2-3 36h Gate A20 Failure
4-2-4  37h Unexpected Interrupt in Protected Mode
4-3-1 38h Memory High Address Line Failure at 
010000h-0A0000h
4-3-3 3Ah Timer Chip Counter 2 Failed
4-3-4  3Bh Time of Day Clock Stopped
4-4-1 3Ch Serial Port Failure
4-4-2 3Dh Parallel Port Failure
4-4-3 3Eh Math Co-processor Failure
  
Troubleshooting Procedures 4-9 
						

							4.2.4 PCMCIA Modem Problems
If an optional PCMCIA modem does not work properly, check the following
items:
·Proper installation of any PCMCIA options (run Phoenix PCMCIA
PhoenixCARD Manager install program).
·Dialing problem or wrong number - Try dialing a number that you have
previously dialed successfully.
·Faulty phone line - Connect a telephone to the line and listen for a dial
tone.
·Software program - Check to ensure that you have installed the
software correctly.
4.2.5 Fault Isolation Using Diagnostics 
PC-Doctor supplied with the TM5000 Series Notebooks is a powerful
diagnostics tool that can help you determine the hardware configuration of
a local or remote system, benchmark its performance, analyze the
performance of all subsystems, and perform a suite of interactive and
non-interactive tests on attached devices (such as printers, joystick devices,
VGA monitors, SCSI devices, CD-ROM drives). The test results are stored in
a log which can be printed out (by pressing F2) or saved in a disk file (by
pressing F3). 
Features of the diagnostic program are accessed through a series of
pull-down menus and basic keyboard keys (cursor keys to move highlighted
pointer, Enter key to select a highlighted feature, ESC key to cancel a
function and move back one level. 
PC-Doctor is typically user friendly but if you don’t understand a feature,
context-sensitive help information is available at any time by pressing the
F1 function key; pressing the F1 function key twice accesses the online
Technical Reference Manual for PC-Doctor. 
A powerful set of utilities within PC-Doctor (that can be run locally or
remotely) simplify the task of determining system configuration data,
allocating and using system memory, IRQ and DMA use, what device drivers
are installed, what COM and LPT ports are assigned and what ports are
available, identifying partitioning data for fixed disk drive(s), determining
the VGA setup information, reading the software interrupts/interrupt
vectors, etc.
  
4-10 Troubleshooting Procedures 
						

							Functionally, PC-Doctor includes the following: 
·Group of nine non-Interactive diagnostic tests that perform a
non-destructive test of the major hardware functions in the notebook
(Processor, Memory, System board, video section, serial and parallel
ports (when loopback adapters are installed), hard disk and floppy disk.
·Group of seven Interactive tests (require operator input) for testing the
keyboard, video sections, sound subsystem, mouse, joystick, diskette
drive, printer subsystem and the SCSI/CD-ROM Drive subsystems
supported by the docking station options.
·Utility that provides detailed system information such as configuration
data, allocation and use of system memory, IRQ and DMA use, what
device drivers are installed, what COM and LPT ports are assigned and
what ports are available, partitioning data for fixed disk drive(s), VGA
setup information, software interrupts and interrupt vectors, and
installed SCSI options. 
·Group of special purpose utilities to run other tests from PC-Doctor,
perform a virus scan of the system, edit configuration files, surface scan
hard drives, measure system performance, open a DOS prompt,
provides terminal access to devices connected to serial ports, supports
memory debug operations, enables remote operations, permits deep
discharge of notebook batteries and provides an extensive test reporting
function.
The PC-Doctor diagnostic program contains a group of nine non-Interactive
diagnostics, available from the Diagnostics heading in the main menu, that
permits testing various hardware sections without operator input. You can
select one, several, or all tests from the Diagnostics menu. These tests are
non-destructive; the serial and parallel port tests require disconnecting
external devices from your notebook and installing loopback plugs. The
Non-Interactive test categories include: 
·CPU and Co-Processor Tests
·Base RAM memory test
·System Board test
·Video Test
·Com1 and LPT1 serial port tests
·Parallel Port Test
·Fixed Disk test
·Diskette Drive tests
·Other devices (Sound card, PCMCIA options, etc.)
  
Troubleshooting Procedures 4-11 
						

							Interactive Tests 
The PC-Doctor diagnostic test includes a suite of seven Interactive tests that
require operator input during the course of the test. The Interactive Tests
category includes: 
·Keyboard- tests the keyboard keys, LEDs and repeat
function 
·Video-tests the LCD and external VGA character sets, and
colors. 
·Speaker-tests the volume response at different frequencies.
·Mouse-tests the mouse driver, buttons and functionality
·Joystick*- calibrates the external joystick connected to the
system and tests the joystick buttons
·Diskette Drive- checks diskette drive functionality
·Maximum System Load- thoroughly exercises system to the
maximum extent possible for performing system burn-in and
test
·Printer Test- tests the operation of a connected printer
·SCSI Test*- sends test codes to attached SCSI devices
(requires use of a Docking System with SCSI)
·CD-ROM Test* - checks out any attached CD-ROM Drive
(requires attachment of a Docking System with CD-ROM
capability)
*devices available when certain external options are installed.
Supporting Online Documentation 
The PC-Doctor Diagnostic contains the following online information sources: 
·Online Technical Manual- selected at any time by pressing F1 key twice
or by clicking on the Question Mark in the upper left hand corner of any
PC-Doctor Menu
·On-line Help system that provides context sensitive information from
every PC-Doctor screen- accessed by pressing F1 key once (pressing F1
twice gets you into the online manual)
  
4-12 Troubleshooting Procedures 
						

							4.2.5.1 User Interface to PC-Doctor
PC-Doctor is structured as a text-mode, windowed user interface with
pull-down menus. Program operation requires the use of the following keys:
·Cursor Keys- move the highlighted pointer
·ENTER Key- Selects the highlighted option
·ESC Key- Cancels current function and goes back one step
·F1 Key- Activates the context-sensitive help feature (pressing F1 twice
in a row calls up the online Technical Reference Manual for PC-Doctor)
Scrolling windows, which show the results of various operations, use the
following keys: 
·Page Up/Page Down - moves the screen one page at a time
·F2- Prints the log to PRN
·F3- saves the log to a file
You can also use the mouse or Point to interact with PC-Doctor. The
leftmost Select key is used to choose objects (menu entries and action
codes typically enclosed in brackets). The rightmost Select key is equivalent
to the ESC key which takes you back to your previous step. 
4.2.5.2 Creating a Bootable Floppy Diskette
Prior to using PC-Doctor, create a bootable floppy diskette using the
following procedure: 
1.     Using DOS, format a floppy diskette. 
2.    From the A: prompt, copy the basic MS-DOS files to the diskette using
the following command: 
Format A: /F:1440 /S 
Where the value 1440 is the capacity of the diskette (1.44 MB in this
example). 
3.     Get into the PC-Doctor directory and copy the PC-Doctor files to the
bootable diskette using the following command:
  XCOPY C:. A:.
After completion of this command, you should have a bootable diskette
containing PC-Doctor. 
  
Troubleshooting Procedures 4-13 
						

							4.2.5.3  Running PC-Doctor 
PC-Doctor is a DOS-resident program that can be run from either hard disk
or from the bootable diskette you previously created.   
1.From the C:\ prompt, type:
PCDR
 and press Enter 
2. The Diagnostics Program loads into system memory, and the LCD
displays the diagnostics Header. 
n
Note: There are a number of command-line switches that can be entered
when starting up PC-Doctor to enable loopback testing of serial/parallel
ports, work from the remote menu if performing remote operations, etc. To
get a listing of the available command-line switches, startup PC-Doctor with
the following command: 
PCDR /? 
and press Enter.
4.2.5.4  Quitting PC-Doctor
To exit PC-Doctor, Select the Quit pull down menu and then select the Quit
to DOS option. 
n
Note: For additional information, press F1 twice to access the online Refer-
ence manual for PC-Doctor. 
  
4-14 Troubleshooting Procedures 
						

							5
Field Service
5.1 Introduction
This section contains preventive and corrective maintenance procedures for
the TravelMate 5000 Series Notebook Computers. The first part of the
section describes the computer cleaning procedures and preferred handling
procedures for sensitive components (e.g. disk drives, batteries).
The second part of the section identifies all field replaceable parts; the
remainder of the section contains removal and replacement procedures for
the field replaceable parts. 
5.2 Preventive Maintenance
Preventive maintenance is limited to cleaning the plastic case, the keyboard,
and the display screen and cleaning the floppy drive heads as required. 
5.2.1 Cleaning the Computer
When it is necessary to clean the plastic case and keyboard, use a soft,
lint-free cloth, slightly dampened with a mild detergent solution or use the
contents of any commercially available computer cleaning kit.
c
Caution: Never use alcohol, petroleum-based solvents, or harsh deter-
gents to clean your computer. Also never spray any liquids directly on
the computer case, keyboard, or screen. If the liquid-crystal display
(LCD) screen has become smeared or dusty, clean the screen by first ap-
plying a mild glass cleaner to a soft, clean, lint-free cloth, and gently
wipe the glass. Never apply liquids directly on the screen surface.
c
Caution: Do not use paper towels to clean the display screen. Paper can
scratch the display screen matte.
5.2.2 Protecting the Disk Drives
To protect the disk drives and data, back up the system disk periodically on
floppy diskettes. Periodically use a head-cleaning diskette in the floppy
diskette drive to prolong the life of the drive and to help maintain data
integrity.
Field Service 5-1 
						

							5.2.3 Handling the Computer Battery Packs
The battery packs furnished with the computer require reasonable care and
handling to ensure efficient operation and maximum life. Periodically
inspect the battery terminals and the batteries for evidence of corrosion and
oxide build-up; clean if necessary.
To ensure that the battery packs endure normal life cycle, always observe
the following precautions when handling the battery packs:
·Do not drop the battery packs or subject them to excessive shock and
vibration.
·Do not expose the battery packs to direct sunlight, moisture, or
chemical compounds.
·Do not disassemble the battery packs.
·Do not use the battery packs to power other devices.
·Do not short the battery leads or connect the battery with reversed
polarity. 
·Never attempt to charge the battery packs in any way other than as
described in this manual.
·Always charge the battery packs as soon as possible after a low battery
indication. 
5.2.4 Restoring System Software
The hard drive on the TM5000 Notebook is factory loaded with MS-DOS,
Windows and TI Utilities and ready for operation. Supplied with the system
is a Recoverydiskette containing software to support rebuilding your
system from diskettes in the event of a disk crash or other catastrophic
event resulting in loss of software (see Section 3 for details). If the system
software is lost and a backup copy is not available on diskettes, you can
purchase a set of diskettes as described in the Preface to this manual.    
5.3 Required Tools and Equipment  
All TravelMate 5000 corrective maintenance procedures can be performed
using the following tools:
·Tweezers
·Small flat-blade screwdriver
·Small Phillips screwdriver
·No. 9 Torx tm Driver (approx. 3 length shank to reach screws in
recessed areas of the chassis). 
·No. 3 Torx Driver
  
5-2 Field Service 
						

							c
Caution: All boards, options and peripherals contain components that
are sensitive to static electricity. When handling any of these items, pro-
tect against static electricity by using wrist or ankle grounding straps
and grounded working mats. When moving or storing items, use the
anti-static bags supplied with the items.
5.4 Notebook Field-Replaceable
Parts and Assemblies
All TravelMate 5000 Series Notebooks contain two major assemblies: 
· System Base Assembly  
· Cover-Display Assembly
The major assemblies are shown in Figure 5-1. 
Cover-Display 
Assembly
System Base Assembly
Figure 5-1  Notebook Major Assemblies
  
Field Service 5-3 
						

							5.4.1 Cover-Display Assembly
As shown in Figure 5-2, the Cover -Display Assembly contains the LCD
screen, Power Inverter Board, Display Adapter Board, Microphone, and four
cable assemblies (Inverter Cable Assembly, TFT Display cable assembly, and
two DAB to Base Cable Assemblies (Left).
The field replaceable components within the Cover Display Assembly are
listed in Table 5-1.
LCD Display Screen
Power Inverter Board
Shown with 
Display Bezel 
Removed
Microphone Assembly
Display Adapter Board (DAB)
Figure 5-2  Cover Display Assembly,
Field Replaceable Units (FRUs)
  
5-4 Field Service