Toshiba Satellite L300 L305 Maintenance Manual

2  Troubleshooting  
2-iv Satellite L300/L305/Satellite Pro L300/EQUIUM L3 00/SATEGO L300     Maintenance Manual 
Figures 
Figure 2-1  Basic Flowchart ........................................................................\
..................... 2-3 
Tables 
Table 2-1  HDD Error Code and Status ........................................................................\
 2-14 
  

2.1 Outline 2  Troubleshooting 
Satellite L300/L305/Satellite Pro L300/EQUIUM L300/SATEGO L300     Maintenance Manual 2-1 
2.1 Outline 
This chapter describes the fault diagnosis proced ures for field replaceable units (FRUs) in the 
computer. 
 
The FRUs covered here are as follows: 
1.  System board    2.   HDD                    3.  Keyboard 
4.  Display    5.  ODD drive    6.  LAN 
7.  Speaker      8.  Cooling module 
 
 
See Chapter 4 for the procedures to replace FRUs  and Chapter 3 for the...

2  Troubleshooting 2.2  Basic Flowchart 
2-2 Satellite L300/L305/Satellite Pro L300/EQUIUM L3 00/SATEGO L300     Maintenance Manual 
2.2 Basic Flowchart 
The basic flowchart in Figure 2-1 serves as a guide for identifying a possibly faulty FRU. 
Before going through the diagnostic flowchart steps, verify the following: 
‰ Ask the user if a password has been register ed and, if so, ask him or her to enter the 
password.  If the user has forgotten the syst em password, use a jump wire to make a 
short...

2.2  Basic Flowchart 2  Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Star
t 
Connect the AC Adapter
DC IN LED on ??
BATTERY LED on ??
Turn the power on.
Any error message displayed ??
Message In Touch with
Tomorrow Toshiba displayed
Follow the power supply diagnostic
procedure in Section 2.3
Follow the power supply diagnostic
procedure in Section 2.3
Follow the system board diagnostic
procedure in Section 2.4
Follow the display diagnostic...

2  Troubleshooting 2.2  Basic Flowchart 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Keyboard works well ??Follow the keyboard diagnostic
procedure in Section 2.6No
1
Insert Bootable CD into ODD
Diagnostic Program 
Loaded  ?? 
Perform each test with the
diagnostic program.
Any error detected by the
diagnostic program ??
 
Perform the continuous test to check if the
error is intermittent.
 
Follow the ODD diagnostic
procedure in Section 2.8
Identify the test re...

2.2  Basic Flowchart 2  Troubleshooting 
Satellite L300/L305/Satellite Pro L300/EQUIUM L300/SATEGO L300     Maintenance Manual 2-5 
If the diagnostic program cannot detect an e rror, the error may be intermittent.  Run the 
continuous test program repeatedly to isolate the problem.  Check  the log utilities function to 
confirm which diagnostic test  detected the error, then perform the appropriate 
troubleshooting procedures as follows: 
 
1.  If an error is detected by the System test, Memory test,...

2  Troubleshooting 2.3  Power Supply 
2-6 Satellite L300/L305/Satellite Pro L300/EQUIUM L3 00/SATEGO L300     Maintenance Manual 
2.3 Power Supply 
The power supply in the computer controls many functions and components. To check if the 
power supply is defective or malfunctioning, follow the troubleshooting procedures below as 
instructed. 
 
Procedure 1  Power Icon Check 
Procedure 2   Connection Check 
Procedure 3  Replacement Check 
Procedure 1  Power Icon Check 
The following two power LEDs...

2.3  Power Supply 2  Troubleshooting 
Satellite L300/L305/Satellite Pro L300/EQUIUM L300/SATEGO L300     Maintenance Manual 2-7 
‰  DC IN LED 
DC IN LED Power supply status 
On in Green  DC power being supplied (from the AC adapter) 
Off Battery damage and can’t charge during DC-in. 
Off Else 
 
If the DC IN LED off, follow the steps below: 
1.  Remove the battery pack and the AC ad apter to shut off power supply to the 
computer. 
2.  Attach the battery and AC adapter back again. 
If the LED still off,...

2  Troubleshooting 2.3  Power Supply 
Procedure 2  Connection Check 
Power is supplied to the system board as illustrated below:  
AC
adaptor System board
AC power cord AC adaptor cord
Battery pack
 
 
Follow the steps below to check whether each  connector has been connected correctly:  
Check 1  Make sure the AC adaptor and AC  power cord have been firmly plugged 
into the DC IN socket and wall outlet,  respectively.  When they have been 
connected correctly, perform Check 2. 
Check 2  Connect a new...

2.4 System Board  2  Troubleshooting 
Satellite L300/L305/Satellite Pro L300/EQUIUM L300/SATEGO L300     Maintenance Manual 2-9 
2.4 System Board 
To check if the system board is defective or malfunctioning, follow the troubleshooting 
procedures below as instructed. 
Procedure 1  Message Check 
Procedure 2  Test Program Check 
Procedure 3  Replacement Check 
Procedure 1  Message Check 
When the power is turned on, the system performs the self-diagnostic Power on Self Test 
(POST) embedded in the BIOS...