My Powerbook 100 works, except for a small problem where the screen doesn't show up. I have found out that this is being caused by 8 small electrolytic capacitors on the back of the LCD which have ALL leaked. I have cleaned up the mess, but the capacitors don't work (no picture on LCD).
I need to know the type of capacitor to replace them with. They are all marked "3.3 3.5V" and the polarity is noted below that. Can I use anything that is greater than this? E.G. would a 16V 33uF capacitor work as a suitable replacement? or should I get the voltage as close as possible (6.3V 47uF)?
A model/type/serial # on the Caps. If you can, Take one to a radio shack and have a tech look it up. I would think that it should be as close to the original Caps. as possible. if it goes to use the Cap. it could prob get a surge.
The voltage listed on the cap is the voltage at which the dielectric breaks down. So it does not hurt to go over.
I always get confused when reading the values on the caps but I think 33uF is correct.
So a 16V 33uF cap is the type to get?
... and the screen now appears: no longer the dreaded dark blue screen. Then I tested this good LCD with some of the spare logic boards that I have in the basement (http://homepage.mac.com/bengi/PhotoAlbum50.html) and I got the dark blue screen, so it means that the same symptom is shared by two different problems: the 8 caps behing the LCD and something else in the LoBo.
Anybody has gone deeper in this thing?
the two 16 volts, 19 uF, in front of the dispay cable connector on the logic biard, seems indeed responsible: I replaced them and the screen is back to life,