Toshiba Satellite L450 L450d Pro Maintanance Manual

							2 Troubleshooting Procedures 
Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
 
                                                                    
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Procedure 5  Connection check and replacement check 
The optical drive connects to the system board. 
The drive may be disconnected, or the drive 
or system board may be damaged. Disassemble the computer following the steps described in 
Chapter 4,  Replacement Procedures, and perform the following checks: 
 
Check 1  Make sure the drive is firmly connect ed to the system board. If the connection is 
good and there is still an  error, go to Check 2. 
Check 2  The drive or drive cable may be de fective or damaged. Replace each with a new 
one following the steps in Chapter 4,  Replacement Procedures. If the drive is still 
not functioning properly, perform Check 3. 
Check 3  The system board may be damaged. Replace it with new one following the  instructions in Chapter 4, Replacement Procedures.  
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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2.10  Modem Troubleshooting 
START
Computer unable to
detect telephone signal?
END
Perform connection check (Procedure 2)
Perform replacement check
(Procedure 3)
Perform telephone line connection check
(Procedure 1)
Check / replace
telephone line and connections
Yes
Replace system board
No
 
Figure 2-9 Modem troubleshooting process  
						

							2 Troubleshooting Procedures 
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This section describes how to determine if 
the computers modem is functioning properly. 
Figure 2-9 outlines the process. Perform the steps below starting with Procedure 1 and 
continuing with the other procedures as required. 
 
Procedure 1:  Telephone line connection check 
Procedure 2:  Modem card connection check 
Procedure 3:  Modem card replacement check 
Procedure 1  Telephone line connection check 
The telephone cable may be damaged or the connections may be loose. Attempt to connect 
the computer to a network through using the mo dem. If the modem does not function at all, 
go to Procedure 3. If the attempt fails because  the computer detects no telephone signal, the 
fault may be in the telephone cable, the wall  socket or the modem port. Perform Check 1: 
 
Check 1  Make sure telephone cable is firmly plugged into both the telephone wall socket  and the modem port of the computer. If  the cable is connected correctly, go to 
Check 2. 
Check 2  Make sure the modem port is firmly  secured to the system board of the computer. 
If the malfunction remains, go to Check 3. 
Check 3  The telephone cable may be damaged. Replace with a good cable. If the  malfunction remains, go to Procedure 2. 
Procedure 2  Modem card connection check 
Disassemble the computer following  the steps described in Chapter 4, Replacement 
Procedures  and ensure that the modem card is well connected to the system board. If the 
problem persists, perform Procedure 3. 
Procedure 3  Modem replacement check 
The modem card or RJ-11 jack may be faulty. Tr y replacing them. If the problem persists, the 
system board may be defective or damaged.   Replace the System Board with a new one 
following the steps in Chapter 4, Replacement Procedures .  
						

							2 Troubleshooting Procedures 
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2.11  Wireless LAN Troubleshooting 
START
Perform diagnostic test
(Procedure 1)
Was a wireless LAN problem delected?
Perform connector and replacement check
(Procedure 2)
Replace wireless LAN antenna/unit
Replace system board
END
Yes
Wireless LAN system
is not faulty. Continue
troubleshooting - refer to Figure 2.1
No
 
Figure 2-10 Wireless LAN troubleshooting process  
The wireless LAN antenna wire, wireless LAN un it or system board may each be the source 
of a wireless LAN fault. Any of these com ponents may be damaged. To determine if the 
computer’s wireless LAN system is functioni ng properly, perform the following procedures.  
						

							2 Troubleshooting Procedures 
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Figure 2-10 outlines the process. Start with 
Procedure 1 and continue with the other 
procedures as instructed. 
Procedure 1:  Diagnostic test 
Procedure 2:  Connector and replacement check 
Procedure 1  Diagnostic test 
Run the Diagnostic Program, which will automatically execute the wireless LAN test.  Test 
and Diagnostic for more information on the program. 
If an error is located, go to Pro cedure 2.  If an error is not located, the wireless LAN system is 
functioning properly. 
 
Procedure 2  Connector and replacement check 
The wireless LAN antenna, wireless LAN unit or  system board may be disconnected or 
damaged.  Disassemble the computer following the steps described in Chapter 4,  Replacement 
Procedures , and perform the following checks. 
 
Check 1  Make sure that the wireless LAN an tenna is firmly connected to the Wireless 
LAN module (refer to Chapter 4 for inst ructions) and that the wireless LAN 
module is securely slotted in to the system board. If the problem persists, go to 
Check 2. 
Check 2  Check that the wireless communication  switch is turned to “On”, and then make 
sure that the wireless communication LED  on the front panel is light. If the LED 
is light but the wireless LAN function is  still faulty, the antenna may be damaged. 
Replace with a new antenna following the steps in Chapter 4,  Replacement 
Procedures . If the problem persists, or if th e wireless LAN LED is not light when 
the wireless communication switch is turned to “On”, go to Check 3. 
Check 3  The wireless LAN unit may be damaged. Replace it with a new one following the  instructions in Chapter 4. If the problem still exists, perform Check 4. 
Check 4  The system board may be damaged.  Replace it with a new one following the  instructions in Chapter 4.  
						

							2 Troubleshooting Procedures 
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2.12  Camera Troubleshooting 
 
Figure 2-11 Camera troubleshooting process 
 
 
  
						

							2 Troubleshooting Procedures 
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The Camera board or system board may be the reason of a Camera fault. Either of these two 
components may be damaged. To determine if the computer’s Camera is functioning 
properly, perform the following procedures. Fi
gure 2-11 outlines the process. Start with 
Procedure 1 and continue with the other procedures as instructed. 
Procedure 1:  Diagnostic test 
Procedure 2:  Connector and replacement check 
Procedure 1  Diagnostic test 
Run the functioning Program in windows, wh ich will display the Camera test result. 
If tests and diagnostics result abnormal go to  Procedure 2. If an error is not located, the 
Camera system is functioning properly. 
 
Procedure 2  Connector and replacement check 
The Camera board or system board may be disconnected or damaged.  Disassemble the 
computer following the steps described in Chapter 4,  Replacement Procedures, and perform 
the following checks. 
 
Check 1  Make sure that the Camera board FFC is  securely slotted into the system board. If 
the problem persists, go to Check 2. 
Check 2  The Camera board may be damaged.  Replace it with a new one following the 
instructions in Chapter 4. If the problem still exists, perform Check 3. 
Check 3  The system board may be damaged.  Replace it with a new one following the  instructions in Chapter 4.  
						

							2 Troubleshooting Procedures 
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2.13  3 in 1 card Troubleshooting   
                       
                               
START
Do errors occur during 3 IN 1 CARD test?
Perform 3 IN 1 card socket replacement check
(Procedure 2)
Replace system board
END
3 IN 1 unit is not faulty.
Perform 3 in 1 CARD test (Procedure 1)
No
Yes
 
Figure 2-12   3in 1 card troubleshooting process 
 
This section describes how to determine if  the Bridge media assemble card player is 
functioning properly. The process is summarized in Figure 2-12. Perform the steps below 
starting with Procedure 1 and continuing  with the other procedures as required. 
  
						

							2 Troubleshooting Procedures 
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Procedure 1:  Bridge media assemble card test 
Procedure 2:  Express socket replacement check 
Procedure 1  Bridge media assemble card test 
The Bridge media assemble card test card c ontains a Bridge media assemble card test 
program. Ensure the card in fully inserted  into the socket before running the program. 
If an error occurs during the Bridge media a ssemble card test, perform Procedure 2. If no 
error occurs, it is likely that the original Bridge media assemble card was faulty. 
Procedure 2  Bridge media assemble card socket replacement check 
The Bridge media assemble card socket may be damaged or defective, fo r instance the socket 
pins can be bent. Disassemble the computer  following the steps described in Chapter 4, 
Replacement Procedures If the problem persis ts, the system board may be defective or 
damaged.  Replace the system board with a new one following the steps in Chapter 4. 
 
 
 
 
 
  
						

							2 Troubleshooting Procedures 
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2.14  HDD Troubleshooting 
                                
      Figure 2-13 HDD troubleshooting process 
 
 
The HDD or system board may be the reason of  a HDD fault. Either of these two components 
may be damaged. To determine if the comput er’s HDD is functioning properly, perform the