Apple Technical ProceduresPowerBook 100Section 7 International Troubleshootingo CONTENTS 7.2 Introduction 7.2 Before You Start 7.2 Things to Remember 7.3 Startup Chords7.3 Display Characteristics 7.4 Symptom Chart 7.4 Power Problems 7.5 Video Problems 7.7 SCSI Hard Disk Drive Problems 7.7 Peripheral Problems 7.9 Internal Modem Problems 7.10 Miscellaneous Problems 7.11 Troubleshooting Flowchart 7.11 Before You Begin 7.11 How to Use the Troubleshooting Flowchart7.12 Troubleshooting Flowchart 7.13 Battery Verification 7.13 AC Adapter VerificationIMPORTANT: U.S. and international service strategies for PowerBook computers differ. U.S. domestic service providers should not use the information in this section, instead refer to Section 4, Troubleshooting. Note: Detailed instructions for underlined steps can be found in Section 2, Take-Apart or in Section 6, International Take-Apart. o INTRODUCTIONBefore Check the battery and AC adapter before beginning You Start a troubleshooting procedure. A low battery, a bad battery, or a bad AC adapter can mimic the symptoms of more-serious conditions. If the main battery is low, use a known-good AC adapter to provide power during testing. Check connections on internal and external cabling and on option cards. Improperly connected cables and cards can produce symptoms of serious failures. If the correct version of system software isn't present, install it and reverify the failure before troubleshooting. The PowerBook 100 requires system software 7.0.1 or later. Many problems that appear hardware related are actually caused by software. Remove all option cards and disconnect external devices (printers, SCSI device, ADB devices, and disk drives). After the PowerBook 100 is fully operational, install and test each option card or peripheral. Install one device and test the system before adding others. Repeat the install-and-test process until all devices are installed and tested.Things to When running the Hard Disk Test diagnostic to test Remember the hard disk, be sure to operate the computer from the AC adapter. Do not select looping. Be sure to follow all electrostatic discharge precautions when working on the PowerBook 100. Refer to the You Oughta Know tab in Apple Service Technical Procedures for additional information.Startup Chords When you switch the computer on, it runs a startup sequence. The system sounds a startup chord (tone), the screen goes to grey, ROM self-tests execute, and the system looks for a startup device from which to load the Macintosh operating system. If any part of the self-test fails, a sequence of chords plays and the startup sequence aborts.Normal Startup During a normal startup sequence, a medium-pitchedSequence chord sounds; then a disk icon with a flashing question mark indicates that the system is looking for a valid startup disk. However, if the internal hard disk contains a valid System Folder and boot tracks, the system boots without displaying the question mark.Error Chords If a startup chord and additional chords sound, a failure has occurred during the system self-test. Three sequences (startup chord, error chord, and test monitor chord) play if an error occurs during startup. If error chords sound during system startup,1. Connect the AC adapter and restart the computer in three or four minutes.2. Replace the memory expansion card (if present) as described in Section 5, Additional Procedures.3. Replace the motherboard.4. Replace the daughterboard.Display The PowerBook 100 uses the Film-compensated Characteristics Supertwist Nematic (FSTN) display. The FSTN technology is different from the transmissive active-matrix technology used by displays in other Macintosh notebook and portable computers. The FSTN also performs differently. Excessive temperatures (exceeding the operating range 5° C40° C) may temporarily reduce FSTN display performance. Slight fuzzy afterimages, or ghosts, are often apparent on the FSTN display. Ghosts are the result of pixel crosstalka condition where pixels adjacent to "on" pixels do not shut off completely. Crosstalk can be minimized by adjusting the brightness and contrast, but crosstalk is inherent in the FSTN technology and cannot be eliminated. o SYMPTOM CHART To use the symptom chart, first find the symptom that most nearly describes the problem; then perform the first corrective action on the list. If that corrective action does not fix the problem, go to the next action. If you replace a module and find that the problem remains, reinstall the original module before continuing.If the symptoms displayed by the PowerBook 100 are not in the symptom chart or if the system is not displaying a clearly defined problem, use the troubleshooting flowcharts.Power Problems Solutions The screen is blank; 1. Verify that the storage switch is in the on position. computer not 2. Reset the computer. responding 3. Connect the AC adapter and restart the computer in three or four minutes.4. Install a known-good, charged main battery. If the computer now works, replace the main battery.5. Verify that the keyboard cable is securely connected.6. Replace the keyboard.7. Replace the daughterboard.8. Replace the motherboard. After changing the Replace the backup batteries. main battery, some Control Panel settings are different After removing This condition is normal. If you disconnect the AC all power sources, adapter, remove the main battery, and remove the some Control Panel backup batteries, you have removed all power to the settings are computer. Removing all power affects some Control different Panel settings (such as time) that are stored in parameter RAM. AC adapter is 1. Verify that the charger is connected properly. plugged in and 2. Try a different main battery. If the battery now connected, but charges, replace the main battery. the battery DA 3. Verify that the adapter is good. does not indicate 4. Replace the AC adapter. the charger is 5. Replace the motherboard. connected A low-power 1. The battery needs recharging. Attach the power warning appears adapter. soon after starting to 2. Make sure peripherals display the low-power icon. use the computer 3. Extensive use of floppy or hard disks, modem, sound, backlight, or other power-consuming devices can produce a low-power warning. Reduce use of these devices or connect the AC adapter.Video Problems Solutions Screen suddenly The computer has gone into system sleep to goes blank conserve battery power. Screen goes blank The computer is going into system sleep to conserve and computer shuts battery power. If the computer is going into system down every few sleep too often, adjust the sleep delays in the minutes Control Panel or connect the AC adapter. A pixel never If more than five pixels do not come on, replace the comes on LCD display. A pixel is always Replace the LCD display. switched on A row of pixels 1. Replace the interconnect cable. never comes on 2. Replace the LCD display.3. Replace the interconnect board.4. Replace the daughterboard.5. Replace the motherboard. A partial or 1. Replace the interconnect cable. complete row of 2. Replace the LCD display. pixels is always on 3. Replace the interconnect board. 4. Replace the daughterboard. 5. Replace the motherboard. A very slight white This is normal for the FSTN screen in the line is always PowerBook 100. in the middle of the screen The display is 1. Adjust the screen contrast and brightness settings. very light or 2. Verify that the interconnect cable, inverter board, totally white interconnect board, daughterboard, and motherboard connections are secure. 3. Replace the inverter board. 4. Replace the interconnect cable. 5. Replace the interconnect board. 6. Replace the LCD display. 7. Replace the daughterboard. 8. Replace the motherboard. No display, but the 1. Adjust the screen contrast and brightness settings. computer appears 2. Check the interconnect cable connections to the to operate correctly inverter board, interconnect board and motherboard. 3. Replace the inverter board. 4. Replace the interconnect cable. 5. Replace the interconnect board. 6. Replace the LCD display. 7. Replace the daughterboard. 8. Replace the motherboard. The display This effect is normal for the FSTN screen in the shows rainbow PowerBook 100. colors from extreme side viewing angles The image on This effect is normal for the FSTN screen in the the display is PowerBook 100. not uniform The display If the temperature or light was extreme stopped working during the problem time (under 5° C or over (or dimmed) 45° C), operation is normal for the FSTN screen but shows no in the PowerBook 100. problems now Backlight doesn't 1. Adjust the screen brightness setting. operate 2. Check interconnect cable, inverter board, interconnect board, and daughterboard connections. 3. Replace the inverter board. 4. Replace the interconnect cable. 5. Replace the interconnect board. 6. Replace the LCD display. 7. Replace the daughterboard. 8. Replace the motherboard.SCSI Hard DiskDrive Problems Solutions Internal hard disk 1. Verify that all external SCSI devices connected to will not operate the computer are switched on.2. Verify that the internal SCSI hard drive cable is securely connected at both ends. 3. Use HD SC Setup (which is supplied with the system software) to see whether the drive is visible to the program. If it is visible, update the SCSI driver. 4. Reinstall the system software. 5. Replace the HDA flex cable that connects the hard disk assembly to the motherboard. 6. Replace the hard disk assembly.7. Replace the motherboard. 8. Replace the daughterboard. The hard disk is Computer is powering down the hard disk or going slow to respond, or into system sleep to conserve battery power. If the the screen goes hard drive is shutting down or the system is going blank too often into system sleep too often, adjust the sleep delays in the Control Panel or connect the AC adapter.PeripheralProblems Solutions After connecting 1. Switch on the external SCSI device before starting an external SCSI up the computer. device, the computer 2. Verify that cable termination is correct. no longer boots 3. Verify that no SCSI device(s) have the same device address.4. Replace the motherboard. 5. Replace the daughterboard. Cursor does not move 1. Reset the computer. when you move the 2. Check the cable connections between the trackball trackball assembly and the motherboard.3. Replace the trackball. 4. Replace the daughterboard.5. Replace the motherboard. Cursor intermittently 1. Clean the trackball ball and internal rollers. does not move or 2. Replace the trackball. moves erratically Cursor does not move 1. Check the mouse connection to the ADB port. when you move the 2. Reset the computer. mouse 3. Clean the mouse ball and inside the mouse. 4. Replace the mouse.5. Replace the motherboard. 6. Replace the daughterboard. Cursor moves, but 1. Check the cable connections between the trackball clicking the button and the motherboard. has no effect 2. Replace the trackball. 3. Replace the daughterboard.4. Replace the motherboard. No response to any 1. Reset the computer. key on the keyboard 2. Connect the AC adapter and restart the computer in three or four minutes.3. Install a known-good, charged main battery. If the computer now works, replace the main battery.4. Verify that the keyboard cable is securely connected.5. Replace the keyboard. 6. Replace the daughterboard.7. Replace the motherboard. Known-good 1. Make sure system software is 7.0.1 or later. ImageWriter, 2. Make sure that the Chooser is set correctly. ImageWriter II, 3. Verify that the printer cable is the correct cable and or LQ will not is securely attached. print 4. Replace the printer cable. 5. Replace the motherboard. 6. Replace the daughterboard. Known-good 1. Make sure that the system software is 7.0.1 or later. LaserWriter 2. Make sure that the Chooser is set correctly. will not print 3. Verify that all printer cabling is securely attached. 4. Try another printer. If that printer works, the computer is OK. Refer to the Networks tab in Apple Service Technical Procedures for further assistance. 5. Replace the motherboard.6. Replace the daughterboard. Serial devices are 1. Make sure that the system software is 7.0.1 or later. unrecognized or 2. Verify that all cabling is correctly and securely garbage is transmitted attached. and/or received 3. Verify that proper cable termination is provided. 4. Attach the device(s) in the chain to a known-good computer. 5. Replace the motherboard.6. Replace the daughterboard.Internal ModemProblems Solutions Internal modem 1. Reseat the modem card. options do not 2. Replace the modem card as described in Section 5, appear in the Control Additional Procedures.Panel window 3. Replace the motherboard. when the modem 4. Replace the daughterboard. is installed Modem does not 1. Verify that the baud rate and data format settings of respond properly the communications application are compatible with to AT command the internal modem and the remote modem. set instructions 2. Verify that the DAA and DAA cable are securely attached and working properly. 3. Verify that the phone line produces a dial tone (attach a phone to the line and listen). 4. Replace the modem card as described in Section 5, Additional Procedures. A strange mix of 1. Verify that the baud rate and data format settings of characters appears the communications application are compatible with on the screen the internal modem and the remote modem. 2. Verify that the DAA and DAA cable are securely attached and working properly. 3. Replace the modem card as described in Section 5, Additional Procedures. Modem interferes 1. Replace the modem card as described in Section 5, with system sound Additional Procedures. 2. Replace the motherboard. 3. Replace the daughterboard. Modem does not 1. If the system doesnt respond to an incoming call respond to during sleep mode, verify that the When Phone incoming call Rings option in the CDEV is selected. 2. Verify that the DAA and DAA cable are working properly. 3. Replace the modem card as described in Section 5, Additional Procedures. 4. Replace the motherboard. 5. Replace the daughterboard. Modem has no Replace the modem card as described in Section 5, sound output Additional Procedures.MiscellaneousProblems Solutions Some applications Computer is switching to system rest. If system seem to run slower rest is interfering with the operation of an after running for application, connect the AC adapter. a few seconds No sound from 1. Verify that the volume setting in the Control Panel speaker is 1 or above.2. Check the speaker connection to the motherboard. 3. Replace the motherboard.o TROUBLESHOOTING FLOWCHARTBefore You Before you begin to troubleshoot the PowerBook 100, Begin perform a quick inspection of the following items to eliminate any obvious problems: Verify that the main battery is installed and is charged. To check the battery voltage, refer to "Battery Verification" later in this section. Verify that all the connectors between the modules and the boards are securely attached. Make certain that all option cards are removed.How to Use the The troubleshooting flowchart verifies operation of theTroubleshooting PowerBook 100 in its minimum configuration. There-Flowchart fore, before using the troubleshooting flowchart, remove all option cards and disconnect any external peripherals (printers, SCSI device, ADB devices, and disk drives).Starting at the top of the flowchart, answer the questions and proceed down the chart. When you arrive at a rectangular box containing a list of actions, perform the actions in the sequence listed. When you finish, return to the preceding diamond box. If the problem remains, reinstall the original module before you go on to the next action.TroubleshootingFlowchart o BATTERY VERIFICATIONMaterials Required VoltmeterProcedure 1. Disconnect the AC adapter.2. Remove the main battery.3. Set the voltmeter range to 10 volts DC.4. Touch and hold the positive probe of the voltmeter to the positive side of the battery.5. Touch and hold the negative probe of the voltmeter to the negative side of the battery.6. The reading for a good battery should be above 5.7 volts. If the battery falls below 5.7 volts, try recharging it. If the battery will not recharge, replace it.o AC ADAPTER VERIFICATIONMaterials Required VoltmeterProcedure 1. Plug the AC adapter into a wall source.2. Set the voltmeter range to 10 volts DC.3. Touch and hold the positive probe of the voltmeter to the inside of the adapter plug.4. Touch and hold the negative probe of the voltmeter to the outside of the adapter plug.5. The reading for a good adapter should be 7.57.9 volts. If the voltage is not in this range, replace the adapter. ∏ @ ˇ ˇˇˇˇ @