Toshiba Personal Computer
Satellite L300/L305 Satellite Pro L300 EQUIUM L300 SATEGO L300
(PSLB0x/PSLB1x)
(PSLB2x/PSLB3x)
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This chapter describes the fault diagnosis procedures
for field replaceable units (FRUs) in the
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The FRUs covered here are as follows:
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1. System
board 2. HDD 3. Keyboard
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4. Display 5.
ODD drive 6. LAN
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7. Speaker 8.
Cooling module
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See Chapter 4 for the procedures to replace FRUs and
Chapter 3 for the procedures to use test
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The following tools are required to perform the
diagnostic procedures:
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1. Diagnostics
(maintenance test program) disk
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2. Phillips
screwdrivers (2 mm, 2.5 mm)
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3. Cleaning
disk kit (for ODD drive cleaning)
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11. DVD TSD-1 (TOSHIBA EMI DVD Test Media)
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The basic flowchart in Figure 2-1 serves as a guide
for identifying a possibly faulty FRU.
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Before going through the diagnostic flowchart steps,
verify the following:
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Ask the user if a password has been registered and, if
so, ask him or her to enter the
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password. If
the user has forgotten the system password, use a jump wire to make a
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location, then turn the computer power on. When booted,
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the computer overrides password protection and
automatically erases the current
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Make sure the Windows® Vista Home Edition has been
installed on the HDD. Any
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other operating system can cause the computer to
malfunction.
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Make sure any piece of optional equipment has
been installed. | |
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If the diagnostic program cannot detect an error, the
error may be intermittent. Run the
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continuous test program repeatedly to isolate the
problem. Check the log utilities
function to
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confirm which diagnostic test detected the error, then
perform the appropriate
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troubleshooting procedures as follows:
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1. If an error
is detected by the System test, Memory test, Async test, Printer test, sound
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test, or Real Timer test, follow the system board
troubleshooting procedures in
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2. If an error
is detected by the Hard Disk test, follow the HDD troubleshooting
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procedures in Section 2.5.
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3. If an error
is detected by the Keyboard test, follow the keyboard troubleshooting
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procedures in Section 2.6.
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4. If an error
is detected by the Display test, follow the display troubleshooting
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procedures in Section 2.7.
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5. If an error
is detected by the ODD test, follow the ODD troubleshooting procedures in
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6. If an error
is detected by the LAN test, follow the LAN troubleshooting procedures in
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7. If an error
is detected by the Finger Print test, follow the Finger Print troubleshooting
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procedures in section 2.10.
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8. If an error
is detected by the Speaker test, follow the Speaker troubleshooting
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procedures in section 2.11.
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9. If an error
is detected by the IEEE 1394 test, follow the IEEE 1394 troubleshooting
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procedures in section 2.12.
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10. If an error is detected by the Fan On/Off test,
follow the cooling module
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troubleshooting procedures in Section 2.13.
The power supply in the computer controls many
functions and components. To check if the
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power supply is defective or malfunctioning, follow
the troubleshooting procedures below as
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Procedure 1
Power Icon Check
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Procedure 2
Connection Check
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Procedure 3
Replacement Check
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Procedure 1
Power Icon Check
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The following two power LEDs indicate the power supply
status:
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The power supply controller displays the power supply
status through the Battery and DC IN
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LEDs as in the tables below.
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Battery LED
Power supply status
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On in Amber
Battery being charged
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On in Green
Battery fully charged, with AC adapter connected
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Battery low *1 while driving the computer
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Off Else
DC IN LED Power
supply status
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On in Green DC
power being supplied (from the AC adapter)
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Off Battery
damage and can’t charge during DC-in.
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If the DC IN LED off, follow the steps below:
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1. Remove the
battery pack and the AC adapter to shut off power supply to the
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2. Attach the
battery and AC adapter back again.
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If the LED still off, follows the steps below:
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Check 1 Make
sure the DC IN LED goes on in Green .
If it does not, go to Procedure
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Check 2 Make
sure the Battery LED goes on in Amber or Green or orange. If it does
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not, go to Procedure 3.
Procedure 2
Connection Check
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Power is supplied to the system board as illustrated
below:
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AC power cord AC adaptor cord
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Follow the steps below to check whether each connector
has been connected correctly:
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Check 1 Make
sure the AC adaptor and AC power cord have been firmly plugged
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into the DC IN socket and wall outlet,
respectively. When they have been
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connected correctly, perform Check 2.
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Check 2 Connect
a new AC adaptor and AC power cord.
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• If the DC IN
LED does not go on, go to Procedure 3.
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• If the
battery LED does not go on, perform Check 3.
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Check 3 Make
sure the battery pack has been correctly installed in the computer.
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If the battery LED does not go on while the battery
pack has been installed
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correctly, go to Procedure 3.
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Procedure 3
Replacement Check
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The system board, power supply board, or CPU may be
faulty. Disassemble the computer
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according to Chapter 4 and follow the steps below:
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Check 1 Replace
the power supply board with a new one.
If the battery pack is still
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not working properly, perform Check 2.
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Check 2 Replace
the system board with a new one. If
the battery pack is still not
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working properly, perform Check 3.
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Check 3
Replace the CPU with a new one | |
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To check if the system board is defective or
malfunctioning, follow the troubleshooting
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procedures below as instructed.
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Procedure 1
Message Check
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Procedure 2
Test Program Check
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Procedure 3
Replacement Check
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Procedure 1
Message Check
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When the power is turned on, the system performs the
self-diagnostic Power on Self Test
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(POST) embedded in the BIOS ROM. The POST tests and initializes each IC on
the system
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If an error message appears on the display, perform
Check 1.
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If there is no error message, go to Procedure 2.
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If FREE-DOS or Windows Vista Home Edition is loaded
normally, go to Procedure
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Check 1 If the
following error message is displayed on the screen, press the F1 key
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as prompted.
These errors occur when the system configuration
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preserved in the RTC memory (generally called CMOS
memory) does not
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match the actual configuration or when the data is
lost.
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If you press the F1 key as prompted by the message,
the TSETUP screen
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appears to set the system configuration. If the error message appears
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frequently when the power is turned on, replace the
RTC battery. If any
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other error message is displayed, perform Check 2.
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Check system.
Then press [F1] key
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Check 2 If the
following error message is displayed on the screen, press any key as
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The error message appears when either data stored in
RAM to be resumed
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is lost because the battery has been exhausted or the
system board is
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If any other error message displays, perform Check 3.
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Check 3
Resume failure and press any key to continue.
To check if the 9.5mm or 12.5mm HDD is defective or
malfunctioning, follow the
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troubleshooting procedures below as instructed.
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Procedure 1
Message Check
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Procedure 2
Partition Check
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Procedure 4
Test Program Check
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Procedure 5
Connector Check and Replacement Check
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The contents of the HDD will be erased when the HDD
diagnostic test or
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formatting is executed. Save the required contents of the HDD to
floppy disks or other
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storage drive in advance.
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Procedure 1
Message Check
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When the computer's HDD does not function properly,
some of the following error messages
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may appear on the display. Follow the steps below to check the HDD.
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Check 1 If
either of the following messages appears, go to Procedure 2. If the
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following messages do not appear, perform Check 3.
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Insert system disk in drive
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Press any key when ready .....
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Non-System disk or disk error
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Replace and press any key
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Check 2 Check
TSETUP to see if the Hard Disk option has been set to “Not used”.
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If so, choose another setting and restart the
computer. If the problem
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persists, go to Procedure 2.
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Procedure 2
Partition Check
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Boot from the DOS system. Perform the following checks:
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Check 1 Type C:
and press the Enter key. If you cannot
change to drive C,
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perform Check 2.
If you can change to drive C, perform Check 3.
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Check 2 Type
FDISK and press the Enter key. Choose
“Display partition
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information” from the FDISK menu. If drive C is listed, perform Check 3.
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If drive C is not listed, return to the FDISK
menu and choose the option to | | | |
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create a DOS partition on drive C. Then restart the computer. If the
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problem persists, go to Procedure 3.
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Check 3 If
drive C is listed as active in the FDISK menu, perform Check 4. If drive
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C is not listed as active, return to the FDISK menu
and choose the option
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to set the active partition for drive C. Then restart
the computer. If the
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problem persists, perform Check 4.
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Check 4 Enter
DIR C: and press the Enter key. If the
following message is
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displayed, go to Procedure 3. If contents of drive C are listed on the
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display, perform Check 5.
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Invalid media type reading drive C
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Check 5 Use the
SYS command in the DOS system to install system files.
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If the following message appears on the display, the
system files have been
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transferred to the HDD. Restart the computer. If the problem persists, go
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System transferred
: If the computer is running Windows Vista Home
edition and the hard disk
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capacity is more than 512 MB, the FDISK program will
ask if you need support for a
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partition larger than 2 GB. Select Y for large partition support;
however, be sure to read
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the precaution regarding access by other operating
systems.
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