MacDat - Capacitor Reference Library

Capacitor Reference - PowerBook 3400c

At this point (2024), the PowerBook 3400c rarely needs to be recapped, however, I have heard of failing caps on the DC Power Board preventing these units from booting. And like any old computer with electrolytic caps, it will need this done eventually, so why not now?

Disclaimer - After recapping my 3400c with this list, the sound can occasionally crackle as the system warms up. This only happens on occasion, but it did not happen at all before the recap. It always goes away completely after by the time it boots. It could be an issue with my PowerBook, or an issue with the caps I used. I just thought that was important to mention.


Reference Values

Logic Board

Value Count Type
33uf 25v 1 Surface-Mount Electrolytic

DC/DC Power Board

Value Count Type
100uf 35v 1 Surface-Mount Electrolytic
33uf 25v 1 Surface-Mount Electrolytic

LCD (Sharp LQ12S11)

There was also a Samsung LCD which used all solid-state caps.

Value Count Type Diameter
220uf 4v 1 Surface-Mount Electrolytic 6mm
22uf 16v 1 Surface-Mount Electrolytic 5mm

Backlight Inverter/Subwoofer board

Value Count Type Diameter
10uf 50v 1 Surface-Mount Electrolytic 6mm
2.2uf 50v 1 Surface-Mount Electrolytic 3mm

Reference Photos

Some images were taken after I recapped the computer. All highlighted caps are electrolytic cans on an unmodified system.

Logic Board

Logic Board Capacitors

DC/DC Power Board

Power Board Capacitors

LCD

LCD Display Capacitors

Inverter

Inverter Board Capacitors

Page last updated (MM/DD/YYYY): 09/27/2024
Update Reason: formatting updated

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