I'm guessing my PowerBook 140 is having a similar screen issue. Prior to today, when I would boot it up (cold start) the screen would be really dark, then would come to the regular contrast after warming up for a few minutes. Now It gets immediately washed out when I boot it up.

Are the capacitors on the front of the display itself? Or on the interconnect/inverter board? I pulled apart my 140's display case and looked over the visible electronics and noticed a few had some sort of corrosion or other gunk on it. See the attached pictures. I think I could replace them.