Parts Identification
The door used on the 6x and 8X drive mechanism is Apple Service Part number 922-2531, Door, CD-ROM, PB1400. This part is now listed as a Replacement Part and is covered under warranty. Service Providers will receive a tier one labor reimbursement for replacing the CD-ROM Door. The door used on the 12X drive mechanism is Apple Service Part number 922-3331, Door, CD-ROM, PB1400. This 1 additional screv located left of center on bottom of 1 2x drive only. part is also listed as a Replacement Part...
Miscellaneous
Screen goes blank and computer shuts down every few minutes Application seems to run slower after a few seconds Hard drive is slow to respond, or screen goes blank too often 1 Verify that computer is in sleep mode and not powered off. 2 Reset power manager. See Power Manager and PRAM Reset in Additional Procedures. Computer is going into system sleep to conserve battery power. Adjust sleep delays in Control Panel or connect power adapter. Computer is switching to system rest. If system rest is...
PRAM and Power Manager Reset
Resetting the PRAM also resets the power manager. Note that resetting the PRAM erases the contents of the RAM disk, if there is one. Resetting the PRAM also restores the default settings in most control panels. After you reset the PRAM, be sure to check any custom settings for the desktop pattern, memory, network, AppleTalk, trackpad, power conservation, and so forth. Follow these steps to reset the PRAM 1 Making sure that the Caps Lock key is not down, restart the computer. Immediately after...
Logic Board Identification
Issue There are two logic boards with ROM version 3 that could be used in the PowerBook 1400, 117MHz and the PowerBook 1400, 133 MHz units. Because dealers must return the same part they ordered to receive reimbursement, it is important to properly identify the logic board before ordering a replacement. Part Number 661-1 188 has ROM U3 Low, 341S0203 and ROM U4 High, 341S0204 . It works in PowerBook 1400, 117 MHz and 133 MHz units. Part number 661-1381 has ROM U3 Low, 341S0364 and ROM U4 High,...
Exploded View
Hard Drive IDE, 2.5 750 MB 661-0957 1 GB 661-1245 I O Door 922-2410 i R Window PCMCIA Door 922-2587 Foot L 922-2571 R 922-2572 Battery niMh 922-2420 The I R window is part of the bottom case. Trackpad Button 922-2538 Trackpad Cable 922-2423 Trackpad Board 922-2465 Trackpad EMI Shield 922-2537 Customer RAM 661-1196 8 MB Factory RAM 661-1293 8 MB 661-1292 4 MB CD-ROM Drive 6x 661-1286 8x 661-1426 The I R window is part of the bottom case. CD-ROM Drive 6x 661-1286 8x 661-1426
Symptom Charts
Remove RAM card if present and restart computer. If startup sequence is normal, replace RAM card and retest. Reseat RAM card and check connection. Hardware failure occurs four-tone error chord sequence sounds after startup chord Reset PRAM. See Power Manager and PRAM Reset in Additional Procedures. Remove floppy drive from media bay and restart computer. If startup sequence is normal, insert floppy drive and retest. Replace floppy mechanism. Disconnect hard drive cable from hard drive and...
Floppy Drive Assembly
Reminder You should have already removed the floppy drive from its compartment. See Modules You Must Remove. 1 Remove the 9 screws from the outer casing of the floppy drive. Disconnect the floppy drive cable from the floppy drive board. Lift the drive out of the bottom cover and disconnect the other end of the cable. Remove the screw from the floppy drive board and lift off the board. Before you continue, remove the following Caution Avoid touching the sensitive wires on the nearby PCMCIA eject...
Trackpad
Before you continue, remove the following 1 Remove the 2 screws from the EMI shield and lift off the shield. Caution Flex cables tear easily handle them carefully. 2 Lift the right trackpad cable connector off its 2 posts and disconnect it from the backup battery. 3 Disconnect the middle trackpad cable connector from the trackpad board. 4 Remove the ferrite bead from the trackpad cable. Insert a flat-blade screwdriver in the lateral grooves to loosen the trackpad button. Angle the button up and...
Hard Drive Cable
Before you continue, remove the following Microprocessor Daughterboard 1 Remove the hard drive cable from the logic board. Replacement Notes Install the cable as shown, noting the position of the cable strap the extra pins the cable does not use Before you continue, remove the following Microprocessor Daughterboard 1 Insert a flat-blade screwdriver under the tab on the door and gently pop off the door. Replacement Note Snap the door firmly into place. Failure to do so will cause the PCMCIA...
PCMCIA Eject Mechanism
Before you continue, remove the following Microprocessor Daughterboard Note The PCMCIA eject mechanism module includes the I R board the I R board is not available individually. Caution The mechanism, pins, and cables on the PCMCIA eject mechanism are fragile. Avoid touching them. Caution Remove the fence from the logic board before attempting to remove the PCMCIA eject mechanism. Failure to do so could damage the mechanism. 2 Using a logic board separator, carefully pry the mechanism up and...
Rear Panel
The rear panel contains the I O ports, reset button, infrared window, and security slot.
GB Hard Drives Formatted Improperly
Issue PowerBook 1400 computers that shipped with one gigabyte 1 GB hard drives were formatted improperly. The improper formatting caused 1 GB hard drives to appear to have only 750 MB of total disk space. Solution This formatting issue has been noted and corrected at Apple's manufacturing site. This issue should no longer be a factor in any new PowerBook 1400 computers. Follow the steps below for identifying models of the PowerBook 1400 that shipped with 1 GB drives, determining whether these...
CDROM Drive Assembly
Reminder You should have already removed the CD-ROM drive from its compartment. See Modules You Must Remove. Remove the 4 screws from the plastic bottom cover. Turn the unit over and lift off the bottom cover. Slide the CD-ROM drive out of the metal top cover. 5 Use a paper clip to manually eject the tray. Remove the 2 screws and lift off the door. Insert the door tabs into the slots under the screw holes.
Logic Board 1
Before you continue, remove the following Microprocessor Daughterboard Note The logic board module includes the ADB EMI Note If a video card was installed, a video expansion bracket will be installed in the I O port instead of a video port plug. Refer to the Upgrades chapter on how to remove this bracket. 1 Open the I O door and locate the video port plug. Note Inside the video port plug is a small indent that assists in its removal. 2 Insert a flat-blade screwdriver under the right side of the...
Bezel
1 Pry off the 2 appliques from the bezel. 2 Remove the 4 screws holding the bezel to the display housing. Overtightening these screws can cause the bezel to crack. To test for overtightening, open and close the display assembly if the assembly creaks, loosen the bezel screws. Interior Display Panel Display Panel Interior Display Panel Display Panel Note The bezel is secured to the display housing by numerous latches, which must be disengaged. 3 Insert a screwdriver into the side of the display...
Clutch Assembly
Before you continue, remove the following Note Each clutch assembly consists of a clutch and clutch bracket. The left and right assemblies are not interchangeable. 1 Remove the 5 screws holding each clutch assembly in place. Set the clutch on the display housing, placing the flat edge as shown. Secure the clutch bracket by installing the innermost screw first. Align the screw holes and install the remaining screws. Align the display with the clutches first, then tighten the screws.
Troubleshooting FlowchartStartup Problems 1
Boot with extensions off. Boot with Disk Tools Update Driver. Replace the hard drive. Replace the logic board. Boot with extensions off. Boot with Disk Tools Update Driver. Replace the hard drive. Replace the logic board. 3. If hard drive appears, reinstall system software. 4. If hard drive doesn't appear, see if Hard Drive Format can reformat it. 5. Replace the hard drive cable. 1. Replace the floppy drive cable. 2. Check the trackpad and keyboard cables. 3. Replace the trackpad and keyboard...
Backup Battery
Before you continue, remove the following Note For this procedure it is not necessary to remove the trackpad just disconnect the trackpad cable from the backup battery. 1 Remove the 2 screws from the backup battery cover. Note The channel for the backup battery cable is obstructed by a screw boss. 2 Lift up the backup battery and carefully guide the cable out of its channel under the EMI shield. 3 Remove the backup battery from the top case. 4 Pry the cover off the backup battery. Install the...
Keyboard Heatsink
Before you continue, remove the following Speaker Grill Grasp the metal frame of the keyboard and pull the keyboard up. Without putting stress on the keyboard cable, gently turn the keyboard onto the top case. 3 Remove 6 screws from the heatsink and lift it off. Replacement Note Slide the heatsink's 2 depressed tabs under the top case and lower the heatsink into place. 4 Disconnect the keyboard cable from the logic board. Replacement Note Connect the keyboard cable before installing the...
Inverter Board
Before you continue, remove the following Note For this procedure it is not necessary to disconnect the display cable from the removed display. Disconnect the cable from the sleep reed switch board. Note The inverter board sits on 3 posts. It is secured by 2 large tabs and numerous small tabs 2 Insert a flat-blade screwdriver into the openings along the outer edge of the inverter board and dislodge the board. Caution If the double-sided conductive tape is no longer sticky, you must replace the...