Battery Verification

Before you begin, remove the main battery. Note The battery desk accessory is a general indicator of the battery charge. Use a voltmeter to determine the actual charge. Awarning The main battery is a NiCad battery that contains toxic materials. Send undamaged, dead batteries to Apple for recycling do not discard dead batteries with other waste. If the battery is damaged, do not return it to Apple. Dispose of damaged batteries according to local ordinances. Review battery handling and disposal...

Interconnect Board

Before you begin, remove the following PowerBookl 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap.Review the ESD interconnect board contains hazardous materials. Return bad interconnect boards to Apple for proper disposal. 1 Caution The keyboard and display ribbon cables are fragile. Handle these cables with care. Lift up the locking tabs on connectors J5 and J3 and remove the keyboard ribbon cables. 2 Pull out the...

Modem Card

Before you begin, remove the following Caution The PowerBook 140 1 45 1 45B 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent ESD damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Note The modem card is an option for the PowerBook 140 1 45 1 45B the card is a standard feature on the PowerBook 1 70. 1 Pinch the release tabs and push out the modem port cover. 2 Connect the modem card connector to motherboard connector J8. 3 Install...

Floppy Drive

Before you begin, remove the following Caution The PowerBook 1 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution The floppy drive ribbon cable is fragile and should be handled with care. Lift the locking tab on connector J9 and remove the floppy drive ribbon cable from the motherboard. 2 Using a T-8 torx driver, remove the five torx screws from the drive retainer. 3...

Display

Before you begin, remove the main battery. Caution The PowerBook 1 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Note This topic includes separate procedures for removing the PowerBook 140 145 FSTN display and the PowerBook 1 70 active-matrix display. Note The PowerBook 1 70 active-matrix display replacement module is available to CPRC and international repairers only....

Inverter Board

Before you begin, remove the following Caution The PowerBook 1 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Important One active-matrix and three FSTN displays are used with the PowerBook 140 145 170 computers. Each display requires a matching inverter. When replacing a display or inverter board, refer to the Display Compatibility Matrix in Basics and to Service Source...

Clutches Display Housing

Before you begin, remove the main battery. 1 Remove the two plastic plugs. 2 Using a T-8 torx driver, remove the two bezel mounting screws from the display. 3 Pull the display bezel down and away to release it from the mounting tabs at the top of the display. 4 Lift the bezel off the display. Cover the keyboard with a clean cloth or sheet of paper. Using a T-8 torx driver, remove the four display mounting screws. Remove the display from the housing and EMI shield. Place the display facedown on...

Peripherals Continued

Cursor does not move when using trackball 2 Check interconnect board, daughterboard, and motherboard connections. 3 Try low-power mouse. If cursor moves, replace trackball or keyboard. Cursor intermittently does not move or moves erratically 1 Clean ball and rollers of trackball.

Power Manager Reset

Reset the power manager if the battery and power adapter are proven good, but the computer will not power on. The computer will not reset after a system crash. To reset the power manager in a PowerBook 140 145 Remove the AC adapter and the battery. Let the unit sit without power hooked up for 3-5 minutes. Using two paper clips, simultaneously hold down the reset and interrupt buttons for 5-10 seconds. Reinstall the battery and, if necessary, reconnect the AC adapter.

Rev C Display Bulb

Before you begin, remove the following Awarning CCFL bulbs are thin and break easily. Handle them with care, especially at the delicate solder joints at the ends of the bulbs. Caution To prevent ESD damage to components, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Note Bulb kits are available for Rev. A and Rev. C displays for the PowerBook 140 and 145. This procedure includes steps for replacing the backlight bulb in a Rev. C display. 1 Place the display...

Rev A Display Bulb

Before you begin, remove the following Awarning CCFL bulbs are thin and break easily. Handle them with care, especially at the delicate solder joints at the ends of the bulbs. Caution To prevent ESD damage to components, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Note Bulb kits are available for Rev. A and Rev. C displays for the PowerBook 140 and 145. This procedure includes steps for replacing the backlight bulb in a Rev. A display. 1 Place the display...

FSTN Display Rev C

A, B, and C FSTN displays are available for the PowerBook 140 145 145B. The Rev. C display has a plastic rear cover, and the display cable connector is located along the outside edge of the printed circuit board. If you are replacing the inverter, display cable, or Rev. C display in a PowerBook 145 145B, use these replacement parts FSTN Display, Rev. C 661 -0745

Displays

Each of the four displays requires a compatible inverter and display cable. Refer to the following pages to identify the displays. The active-matrix display is available for the PowerBook 1 70 only. Use the following replacement parts with the PowerBook 1 70 Active Matrix Display 661 -071 1

Display Cable Shim Installation

Powerbook 145 Display Connections

Before you begin, remove the main battery. Note Some PowerBook 140 145 170 displays may flicker, intermittently go black, or display two horizontal black lines. If you encounter any of these problems, try squeezing the right side of the display bezel. If squeezing the bezel causes the condition to improve or to worsen, install a shim on the display cable. The shim improves the connection between the connector fingers and the cable contacts. Note Do not install a shim onto a display cable that...

Peripherals

After connecting external SCSI device, computer doesn't boot 1 Switch on external SCSI device before starting computer. 3 Verify that standard Apple terminator terminates SCSI chain at beginning and end. 4 Verify that SCSI select switch setting on external device is unique. 5 Verify operation of internal hard drive. 6 Try known-good external SCSI device.

Main Battery

Before you begin, disconnect the power adapter. Note This procedure also covers removal of the main battery door. Important Before removing the main battery, use the Macintosh Shut Down command. Otherwise, all RAM contents will be lost. Awarning The main battery is a NICAD battery that contains toxic materials. Send undamaged, dead batteries to Apple for recycling do not discard dead batteries with other waste. If the battery is damaged, do not return it to Apple. Dispose of damaged batteries...

Daughterboard

Before you begin, remove the following RAM expansion card (if present) Caution The PowerBook 1 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. 1 Using a T-8 torx driver, remove the four daughterboard mounting screws. Caution Always use the logic board take-apart tool to separate the daughterboard connector from the motherboard connector. Trying to disconnect the...

FSTN Display Rev B

A, B, and C FSTN displays are available for the PowerBook 140 145 145B. The printed circuit board is exposed at the rear of the Rev. B display, and the display cable connector is located near the center of the board. If you are replacing the inverter, display cable, or Rev. B display in a PowerBook 140 145, use these replacement parts FSTN Display, Rev. B 661-0681

Power Continued

1 Recharge battery or attach power adapter. 2 Verify that peripherals are low-power. 3 Reduce use of power-consuming devices or connect power adapter. 4 Try known-good, charged main battery. 5 Try known-good power adapter. Computer runs when plugged in to wall outlet but not on battery power battery voltage is within tolerance 1 Reseat battery to make sure it is mating with contacts on motherboard. 2 If motherboard includes removeable fuse, replace fuse.

Battery Handling

The PowerBookl 40 1 45 1 70 main battery is a nickel cadmium (NiCad) battery with a voltage of 5.65-7.5 volts. Its longevity is estimated at 500 power cycles. To extend its longevity, follow the battery handling instructions. Awarning The main battery contains toxic materials. Send undamaged, dead batteries to Apple for recycling do not discard dead batteries with other waste. If the battery is damaged, do not return it to Apple. Dispose of damaged batteries according to local ordinances....

Motherboard

Before you begin, remove the following RAM expansion card (if present) Caution The PowerBook 1 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. 1 Caution The hard drive, floppy drive, and thermistor cables are fragile. Handle them with care. Lift up the locking tabs and remove the hard drive, floppy drive, and 2 Remove the two hex nut screws and lift the motherboard out of...

Display Compatibility Matrix

Important The PowerBook family includes four displays an active matrix and three FSTN displays. Each of these displays requires a compatible inverter and display cable the inverters, display cables, and displays are not interchangeable. Before ordering a replacement display, display cable, or inverter, refer to the display matrix.

How To Open Macintosh Powerbook 140

No preliminary steps are required before you begin this procedure. PowerBook140 145 170 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. 2 Carefully bend the door so that the middle bows outward and unhinge the two bottom door pegs.

Video Continued

No display, but computer appears to operate correctly 2 Check display cable, inverter board, interconnect board, daughterboard, and motherboard connections. 5 Add shim to display cable. Refer to Additional Procedures. 8 Replace FSTN display (all repairers) or replace active-matrix display (CPRC international repairers only). 9 Replace daughterboard. 1 0 Replace motherboard.

Actuators

Before you begin, remove the following PowerBookl 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Note The PowerBook 1 70 has a brightness actuator only contrast is preset . The PowerBook 140 has both contrast and brightness actuators. Pull up and rotate the actuator toward the display to remove it from the top case.

Trackball Assembly

Before you begin, remove the following PowerBookl 40 1 45 1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. 1 Caution The trackball ribbon cable is fragile and should be handled with care. Pull out the locking tab on the trackball connector and remove the trackball ribbon cable. 2 Using a T-8 torx driver, remove the two mounting screws and lift the trackball assembly out of the top...

Sound and Video

Flat-panel, film-compensated supertwist nematic FSTN liquid crystal display CCFL on-demand backlight 640 by 400 pixels Video Display 170 10 in. 254 mm diagonal screen Flat-panel, active-matrix liquid crystal display CCFL on-demand backlight 640 by 400 pixels Sound Generator Apple sound chip provides 8-bit sound capable of driving stereo headphones or other stereo equipment through the sound jack