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Troubleshooting PowerBook 140/145/170 Startup Problems Flowchart/
PowerBook 140/145/170 Startup Problems
Flowchart
START
Reset the power
manager.
Press the power button to
begin the startup sequence.
Do the
startup tones
sound?
No
Yes
Is the
startup tone
normal?
Yes
Does any
video
appear?
No
Yes
See Startup Problems in
the Symptom/Cure Chart.
No
1. Check the cables.
2. Replace the inverter board.
3. Replace the interconnect board.
4. Replace the display cable.
PowerBook 520, 520c, 540,
540c: Replace the interconnect-
to-display cable.
5. Replace the display.
PowerBook 170, 180, 180c:
Replace the display
(international only) or
return the computer to Apple.
6. Replace the daughterboard.
7. Replace the motherboard.
1. Check the cables.
2. Replace the interconnect board.
3. Replace the daughterboard.
4. Replace the motherboard.
Does a
gray pattern
appear?
Yes
No
1
1. Replace the daughterboard.
2. Replace the motherboard.