Chapter 6 Testing and Troubleshooting
Contents
1. Check 4 Replace the LCD FL cable with a new one and test display again f the problem still exists perform Check 5 Check 5 Replace the CPU with another of the same specifications f the problem still exists perform Check 6 Check 6 6 10 GL31 Service Manual The system board be damaged Replace it with new 6 11 GL31 Service Manual Keyboard Troubleshooting 6 12 START Ad Perform external keyboard check Procedure 1 x Does the external keyboard function ok gt il l Perform diagnostic check Procedure 2 X Was a keyboard problem detected Y Yes Perform connector and replacement check Procedure 3 Replace system board Noe Keyboard is not faulty Continue troubleshooting refer to Figure 2 1 Figure 6 5 Keyboard troubleshooting process GL31 Service Manual To determine if the computer s keyboard is functioning properly perform the following procedures Figure 6 5 outlines the process Start with Procedure 1 and continue with the other procedures as instructed Procedure 1 External keyboard check Procedure 2 Diagnostic check Procedure 3 Connector and replacement check Procedure 1 External keyboard check Connect a USB keyboard to one of the computer s keyboard mouse ports then boot the computer The computer automatically detects the externa2. 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 f the malfunction remains go to Check 3 Check 3 The telephone cable may be damaged Replace with a good cable f the malfunction remains go to Procedure 2 Procedure 2 Modem card connection check Disassemble the computer following the steps described 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 Try 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 Replacement Procedures 6 2 GL31 Service Manual PCMCIA Troubleshooting START v Perform SYCARD test Procedure 1 Do errors occur during SYCARD test Yes v 2 No PCMCIA unit is not faulty Perform PCMCIA socket replacement check Procedure 2 v Replace system board END Figure 6 13 PCMCIA troubleshooting process 6 3 GL31 Service Manual l This section describes how to determine if the PCMCIA card player is functioning properly The process is summarized in Fig
3. to Procedure 2 Procedure 2 TV set check The TV set may be faulty Perform Check 1 Check 1 Try using the set for television reception If it does not work the set may be damaged f the set does work perform Check 2 Check 2 Try connecting a different television to the computer If the replacement television works the original set may be damaged f the replacement set does not work the system board may be damaged 6 17 GL31 Service Manual Touch Pad Troubleshooting START v Touch Pad connection check Procedure 1 Touch Pad replacement check Procedure 2 yY Replace system board Figure 6 9 Touch Pad troubleshooting process 6 18 GL31 Service Manual To determine if the computer s built in Touch Pad is functioning properly perform the following procedures Figure 6 9 outlines the process Start with Procedure 1 and continue as instructed Procedure 1 Touch Pad connection check Procedure 2 Touch Pad replacement check Procedure 1 Touch Pad connection check The Touch Pad is connected by the Touch Pad FPC to the system board Make sure the Touch Pad FPC cable is firmly connected to the Touch Pad and system board Disassemble the computer and then perform the following checks If any of the connections are loose reconnect firmly If any of the connections is damaged or there is still an error go to Procedure 2 Procedure2 Touch Pad repl
4. Chapter 6 Testing and Troubleshooting GL31 Service Manual Testing and Troubleshooting The purpose of this chapter is to provide a systematic method of isolating problems you may have with the HGL3031 series Notebook Computer We assume that you have a basic understanding of DOS based computer systems as well as knowledge of standard trouble shooting procedures This manual is written under the assumption that the problems are indeed related with Notebook itself The improper usage and application software problems are excluded in this chapter The system BIOS Beep Code is an integrated unit to detect some errors in the system board This beep code will give immediate identification of certain system board problems If the troubleshooting procedure is followed step by step it can efficiently isolate the problem and the problem can be solved easily PERFORM VISUAL INSPECTION Check the following Power cords are properly connected and secured Power supply is adequate for operation There are no obvious shorts or opens There are no obviously burned or heated components All components appear normal Troubleshooting Flowchart Use the flowchart in Figure 6 1 as a guide for determining which troubleshooting procedures to execute Before going through the flowchart steps verify the following Ask the user if a password is registered and if it is ask him or her to enter the password Verify with the customer that Windows X
5. Check 1 Use a multi meter to make sure that the fuses on the system board are not blown If a fuse is not blown go to Check 2 If a fuse is blown go to Check Check 2 Make sure that the battery cable is firmly connected to the system board If it is connected firmly go to Check Check 3 The system board may be damaged Replace it with a new one following the instructions in Chapter 4 6 8 GL31 Service Manual Display Troubleshooting START Ad Perform external display check Procedure 1 Does the external display function ok Perform diagnostic check Procedure 2 Yes x d Display is not Was a display faulty Continue problem detected pe troubleshooting N refer to Figure 2 1 Y Yes Perform connector and replacement check Procedure 3 Replace system board Figure 6 3 Display troubleshooting process GL31 Service Manual This section describes how to determine if the computer s display is functioning properly The process is outlined in Figure 6 3 Start with Procedure 1 and continue with the other procedures as instructed Procedure 1 External display check Procedure 2 Diagnostic check Procedure 3 Connector and replacement check Procedure 1 External display check Connect an external display to the computer s external monitor port then boot the computer The computer automat
6. Is the diagnostics test loaded pe System is normal End Perform the keyboard No Troubleshooting procedures in section 6 5 Perform the FDD Troubleshooting procedures in section 6 4 No After confirming which diagnostics test has detected an error perform the appropriate procedure as outlined below Yes _ gt Figure 6 1 Troubleshooting flowchart 2 2 6 3 GL31 Service Manual If the diagnostics program cannot detect an error the problem may be intermittent The test program should be executed several times to isolate the problem When a problem has been located perform the appropriate troubleshooting procedures as follows H an error is detected by the main battery test perform the Power Supply Troubleshooting procedures in Section 6 2 If an error is detected by the display test perform the Display Troubleshooting procedures in Section 6 3 If an error is detected by the floppy disk test perform the FDD Troubleshooting procedures in Section 6 4 f an error is detected by the keyboard test perform the Keyboard Troubleshooting procedures in Section 6 5 f an error is detected by the printer parallel port test perform the Printer Port Troubleshooting procedures in Section 6 8 If an error is detected by the CD ROM DVD ROM test perform the DVD ROM and CD RW DVD ROM Troubleshooting Procedures in Section 6 11 If an error is detected by the Mo
7. P SP2 is installed on the hard disk Operating systems that were not preinstalled by Compal can cause the computer to malfunction Make sure all optional equipment is removed from the computer Make sure the floppy disk drive is empty 6 1 GL31 Service Manual START Y Connect the AC adapter to the DC IN socket Perform the Power Supply No Troubleshooting procedures in section 6 2 IstheDC INLEDon Yes Perform the Power Supply No Troubleshooting procedures in section 6 2 lt Is the Battery LED on gt Yes Turn the Power switch on Yes Ly Perform the Power Supply No Troubleshooting procedures in section 6 2 lt lt Is the Power On LED Perform the Display No Troubleshooting procedures in section 6 3 FEER Is the logo message display Yes v If the password message displays type the password then press Enter lt c ts Windows being loaded _ E No Perform diagnostics program Figure 6 1 Troubleshooting flowchart 1 2 6 2 GL31 Service Manual Does typed characters appear correctly Yes Insert the diagnostics disk into FDD Then run the diagnostics test program Yes Bex ped Yes Allow each test to perform automatically Isanerror detected by any ofthe gt diagnostics tests No v ERI
8. acement check The Touch Pad unit or FPC may be defective or damaged 6 19 GL31 Service Manual Speaker Troubleshooting START E Perform audio source test Procedure 1 pur bw Speakers are not Do all sources have faulty Continue problem No troubleshooting S gt see Figure 2 1 i Perform earphone test Procedure 2 3 Do earphones function correctly uf Y Perform connection check Procedure 3 Perform replacement check Procedure 4 4 Replace system board m END Figure 6 10 Speaker troubleshooting process 6 20 GL31 Service Manual To determine if the computer s built in speakers are functioning properly perform the following procedures Figure 6 10 outlines the process First adjust the speaker volume to an appropriate level Start with Procedure 1 and continue as instructed Procedure 1 Audio source test Procedure 2 Earphone test Procedure 3 Connection check Procedure 4 Replacement check Procedure 1 Audio source test Use different audio sources e g an audio CD and digital music file to determine whether the fault is in the speaker system or not If not all sources have sound problems the problem is in the source devices If all have the same problem continue with Procedure 2 Procedure2 Earphone test Connect a set if earphones or external speakers If these function cor
9. ber blinking Battery within critical low state 3 minutes LED on 1 second remaining The system is protected and cannot be every 2 seconds re powered on without the AC power connected Amber solid on Battery not in low or critical low state in discharging state Table 2 2 POWER LED Power supply status POWER LED System Power On LED is solid Green Green Solid on System Suspended System Power Of To check the power supply status install a battery pack and connect an AC adaptor to the DC IN port on the computer and to a power supply If the Battery LED are not lit go to Procedure 2 6 6 GL31 Service Manual EE Procedure 2 Adaptor battery replacement A faulty adaptor may not supply power or may not charge the battery Perform Check 1 Check 1 Connect a new AC adaptor If the problem is not resolved go to Check 2 Check 2 Insert a new battery If the problem is still not resolved go to Procedure 3 Procedure 3 Power supply connection check The power supply wiring diagram is shown below AC adaptor cord AC power cord Any of the connectors may be disconnected Perform Check 1 Check 1 Disconnect the AC power cord from wall outlet Check the power cable for breaks f the power cord is damaged connect a new AC power cord If there is no damage go to Check 2 Check 2 Make sure the AC adaptor cord and AC power cord are firmly plugged into the DC IN socket AC adaptor inlet and wall ou
10. d may be damaged Go to Procedure 2 Procedure2 Replace system board If the error persists the system board may be damaged 6 15 GL31 Service Manual TV Out Failure Troubleshooting START Perform TV connection check Procedure 1 Does replacement TV cable function properly No Replace TV cable T Perform TV set check Procedure 2 Use different TV Ho set TV functioning ok END Figure 6 7 TV out troubleshooting process 6 16 GL31 Service Manual To determine if the computer s TV out port is functioning properly perform the following procedures Figure 6 7 outlines the process Start with Procedure 1 and continue as instructed Procedure 1 TV connection check Procedure 2 TV set check Procedure 1 TV connection check The TV cable may be damaged or the connections may be loose Perform Check 1 Check 1 Make sure TV cable is firmly plugged into both the TV set and the TV out port of the computer If the cable is connected correctly go to Check 2 Check 2 Make sure the TV out port is firmly secured to the system board of the computer f the malfunction remains go to Check Check 3 The TV cable may be damaged Replace with a good cable If the malfunction remains go
11. dem test perform the Modem Troubleshooting Procedures in Section 6 12 or the LAN Troubleshooting Procedures in Section 2 11 f an error is detected by the Sound test perform the Sound Troubleshooting Procedures in Section 2 12 Other problems that are not covered by the diagnostics program may be discovered by a user If an error is detected when using an external USB device perform the External USB Devices Troubleshooting procedures in Section 6 6 If an error is detected when using the TV out connection perform the TV Out Failure Troubleshooting procedures in Section 6 7 f an error is detected when using the touch pad perform the Touch Pad Troubleshooting procedures in Section 6 9 f an error is detected when using the speakers perform the Speaker Troubleshooting procedures in Section 6 10 f an error is detected when using the CD DVD drive perform the CD ROM DVD Drive Troubleshooting procedures in Section 6 11 If an error is detected when using the modem perform the Modem Troubleshooting procedures in Section 6 12 f an error is detected when using the PCMCIA unit perform the PCMCIA Troubleshooting procedures in Section 6 13 6 4 GL31 Service Manual Power Supply Troubleshooting START Check Power Supply Status Procedure 1 Are the DC IN and Battery LEDs lit Replace adaptor battery No Procedure 2 a Y Check power supply c
12. e system board Procedure 2 Figure 6 6 External USB device troubleshooting process 6 14 GL31 Service Manual To determine if the computer s external USB devices are functioning properly perform the following procedures Figure 6 6 outlines the process Start with Procedure 1 and continue as instructed Procedure 1 External device and connection check Procedure 2 Replace system board Procedure 1 External device and connection check The USB device may be damaged or the connection may be faulty Perform Check 1 Check 1 Make sure USB device cable is firmly plugged into one of the USB sockets f the cable is connected correctly go to Check 2 Check 2 Plug the USB device into another USB socket there are three in all f the USB device still does not work go to Check 4 If the device functions correctly when connected to another USB port go to Check Check 3 Make sure that the USB socket is firmly secured to the system board of the computer f the malfunction remains the system board may be damaged Go to Procedure 2 Check 4 Connect an alternative USB device to one of the computer s USB ports and then boot the computer The computer automatically detects the external device f the alternative USB device works correctly the original device may be damaged and should be replaced f the alternative USB device appears to have the same problem as the original device the system boar
13. e wireless LAN LED is not lit 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 f 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 6 6 GL31 Service Manual Fingerprint function Troubleshooting Fingerprint connection check Procedure 1 Fingerprint replacement check Procedure 2 Replace system board Figure 6 16 Fingerprint troubleshooting process 6 7 GL31 Service Manual l To determine if the computers built in fingerprint is functioning properly perform the following procedures Figure 6 16 outlines the process Start with Procedure 1 and continue as instructed Procedure 1 fingerprint connection check Procedure 2 fingerprint replacement check Procedure 1 Fingerprint connection check The Fingerprint is connected by the Fingerprint FPC to the system board Make sure the Fingerprint FPC cable is firmly connected to the Fingerprint and system board Disassemble the computer and then perform the following checks If any of the connections are loose reconnect firmly If any of the connections is damaged or there is still an error go to Procedure 2 Procedure2 Fingerprint replacement check The Fingerprint unit or FPC may be defective or damaged 6 8
14. ically detects the external display Press Fn F5 to switch to the external display If the external display works correctly the internal LCD may be damaged Go to Procedure 3 If the external monitor appears to have the same problem as the internal monitor the system board may be damaged Go to Procedure 2 Procedure 2 Diagnostic check The Display Test program is stored on the computer s Diagnostics disk This program checks the display controller on the system board Insert the Diagnostics disk in the computer s floppy disk drive turn on the computer and run the test Refer to Chapter 3 Tests and Diagnostics for details If an error is detected go to Procedure 3 If an error is not detected the display is functioning properly Procedure3 Connector and replacement check The FL inverter board LCD module and system board are connected to the display circuits Any of these components may be damaged Replacement Procedures for instructions on how to disassemble the computer and then perform the following checks Check 1 Make sure the DDRRAM module is seated properly Test display again f the problem still exits replace the DDRRAM module If the problem still exists perform check 2 Check 2 Replace the FL inverter board with a new one and test display again f the problem still exists perform Check 3 Check 3 Replace the LCD module with a new one and test display again H the problem still exists perform Check 4
15. ing check Procedure 3 Software check Procedure 4 Diagnostic test Procedure 5 Connection and replacement check Procedure 1 Audio CD check First insert an audio CD into the CD DVD drive If it works the problem is not with the drive Go to Procedure 3 If the audio CD does not work go to Procedure 2 If the CD DVD LED on the front panel does not light when the disc is played and the drive gives no response go straight to Procedure 3 Procedure 2 Drive cleaning check Insert a CD DVD drive cleaning disk into the drive clean according to the drive cleaning product instructions If the problem persists go to Procedure 3 Procedure 3 Software check Ensure that the appropriate driver has been installed on the computer for the CD DVD drive Procedure 4 Diagnostic test The CD ROM DVD ROM test program stored in the Diagnostics Disk will test the drive s ability to play an audio CD as well as the functions of the CD control buttons If any errors occur while executing the diagnostic program go to Procedure 5 Procedure5 Connection check and replacement check The DVD ROM drive or the CD RW DVD ROM drive connects to the system board The drive may be disconnected or the drive or system board may be damaged Replacement Procedures and perform the following checks Check 1 Make sure the drive is firmly connected to the system board f the connection is good and there is still an error go to Check 2 Check 2 The drive
16. l keyboard If the external keyboard works correctly the internal keyboard or its connections may be faulty Go to Procedure 2 If the external keyboard appears to have the same problem as the internal keyboard the system board may be damaged Procedure 2 Diagnostic test Run the Diagnostic Program which will automatically execute the Keyboard Test Refer to Chapter 3 Tests and Diagnostics for more information on how to run the program If an error is located go to Procedure 3 If an error does not occur the keyboard is functioning properly Procedure3 Connector and replacement check The keyboard and or system board may be disconnected or damaged Replacement Procedures and perform the following checks Check 1 Make sure the keyboard cable is firmly connected to the system board f the connection is loose reconnect firmly and repeat Procedure 2 f there is still an error go to Check 2 Check 2 The keyboard may be damaged H the problem still exists perform Check 3 Check 3 The system board may be damaged Replace it with a new one 6 13 GL31 Service Manual External USB Devices Troubleshooting START Perform external device and connection check Procedure 1 E Does the device function lt when connected to different USB port Does an alternative USB i Original USB device function correctly device is faulty I No Y Replac
17. mputer s wireless LAN system is functioning properly perform the following procedures Figure 2 15 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 Refer to Chapter 3 Tests and Diagnostics for more information on the program If an error is located go to Procedure 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 antenna is firmly connected to the wireless LAN unit refer to Chapter 4 for instructions and that the wireless LAN unit is securely slotted into the system board f the problem persists go to Check 2 Check 2 Check that the wireless communication switch is turned to On then make sure that the wireless communication LED on the front panel is lit If the LED is lit 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
18. onnections Procedure 3 Can you turn the computer on Pd Run diagnostic program Ke Procedure 4 No Perform internal connection check No Procedure 5 Are the internal power connections secure Yes Replace system board Figure 6 2 Power Supply Troubleshooting Process GL31 Service Manual The power supply controls many functions and components To determine if the power supply is functioning properly start with Procedure 1 and continue with the other Procedures as instructed The flowchart in Figure 6 2 gives a summary of the process The procedures described in this section are Procedure 1 Power status check Procedure 2 Adaptor battery replacement Procedure 3 Power supply connection check Procedure 4 Diagnostic check Procedure 5 Internal connection check Procedure 1 Power Status Check The following LEDs indicate the power supply status Battery LED The power supply controller displays the power supply status through the Battery and the POWER LEDs as listed in the tables below Table 2 1 Battery LED Battery State LED colors Definition Green solid on Battery charging with AC Amber solid on Battery fully charged by AC color off Battery abnormal stop charging with AC Bad cell Overheated Discharging Amber blinking Battery within low state 12 minutes remaining LED on for 1 second every 4 seconds Am
19. or drive cable may be defective or damaged Replacement Procedures If the drive is still not functioning properly perform Check 3 Check 3 The system board may be damaged 6 23 GL31 Service Manual Modem Troubleshooting START EN Perform telephone line connection check Procedure 1 i Computer unable to detect telephone signal lt Check replace Yes telephone line and connections Y Perform connection check Procedure 2 Perform replacement check Procedure 3 v Replace system board END Figure 6 12 Modem troubleshooting process 6 1 GL31 Service Manual ES This section describes how to determine if the computer s modem is functioning properly Figure 6 12 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 modem 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
20. rectly go to Procedure 3 If they do not function correctly the system board may be defective or damaged Replace it with a new one Procedure 3 Connection check Disassemble the computer following the steps described Replacement Procedures and make sure the speaker cable is firmly connected to the system board If the stereo speakers are still not functioning properly go to Procedure 4 Procedure4 Replacement Check If the stereo speakers don t sound properly the stereo speakers may be defective or damaged Replace them with new ones If the stereo speakers still do not work properly 6 21 GL31 Service Manual ODD Troubleshooting START id Perform audio CD check Procedure 1 Perform drive Audio CD functions ok gt No cleaning check i Procedure 2 S Yes Y Perform software check Procedure 3 Perform diagnostic test Procedure 4 Perform connection and replacement check Procedure 5 Replace system board END Figure 6 11 ODD drive troubleshooting process 6 22 GL31 Service Manual This section describes how to determine if the computer s internal DVD ROM drive or CD RW DVD ROM drive is functioning properly Figure 6 11 outlines the process Perform the steps below starting with Procedure 1 and continue with the other procedures as required Procedure 1 Audio CD test Procedure 2 Drive clean
21. tlet If these cables are connected correctly go to Check Check 3 Make sure that the DC IN input port socket is firmly secured to the system board of the computer f the DC IN input socket is loose go to Procedure 5 If it is not loose go to Check 4 Check 4 Use a multi meter to make sure that the AC adaptor output voltage is close to 19 V f the output is several percent lower than 19 V go to Check 5 If the output is close to 19 V go to Check 6 6 7 GL31 Service Manual Ess Check 5 Connect a new AC adaptor or AC power cord f the battery LED does not light go to Check 6 Check 6 Make sure the battery pack is installed in the computer correctly If the battery is properly installed and the battery LED still does not light go to Procedure 4 Procedure4 Diagnostic check The power supply may not charge the battery pack Perform the following procedures Reinstall the battery pack Attach the AC adaptor and turn on the power If you cannot turn on the power go to Procedure 5 Run the Diagnostic test following the procedures described Tests and Diagnostics If no problem is detected the battery is functioning normally Procedure5 Replacement check The system board may be disconnected or damaged Disassemble the computer following the steps described Replacement Procedures Check the connection between the AC adaptor and the system board After checking the connection perform Check 1
22. ure 6 13 Perform the steps below starting with Procedure 1 and continuing with the other procedures as required Procedure 1 Sy card test Procedure 2 PCMCIA socket replacement check Procedure 1 SYCARD test The SYCARD test card contains a PCMCIA test program Ensure the card in fully inserted into the socket before running the program If an error occurs during the SYCARD test perform Procedure 2 If no error occurs it is likely that original PC card was faulty Procedure 2 PCMCIA socket replacement check The PCMCIA socket may be damaged or defective for instance the socket pins can be bent Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and replace the socket If the problem persists the system board may be defective or damaged 6 4 GL31 Service Manual Wireless LAN Troubleshooting START Perform diagnostic test Procedure 1 p Wireless LAN Was an wireless LAN problem delected No system is SE not faulty Yes Perform connector and replacement check Procedure 2 Replace wireless LAN antenna unit v Replace system board i END Figure 6 15 Wireless LAN troubleshooting process 6 5 GL31 Service Manual il The wireless LAN antenna wire wireless LAN unit or system board may each be the source of a wireless LAN fault Any of these components may be damaged To determine if the co
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