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Toshiba Satellite L450 L450d Pro Maintanance Manual

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    							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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    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     28 
    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 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     29 
    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 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     30 
    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 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     31 
    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 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     32 
    2.12  Camera Troubleshooting 
     
    Figure 2-11 Camera troubleshooting process 
     
     
      
    						
    							2 Troubleshooting Procedures 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     33 
    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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     34 
    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 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
     35 
    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 
    Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual 
     
                                                                        
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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  
    						
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