Waaaay back in 2007 I traded an inoperable Powerbook 100 for a working Powerbook 160, which was a welcome upgrade allowing me to open and view legacy files from my early days of design. The 160 worked for a couple of years and then died around 2013. I did some reading at that point and replaced the PRAM battery, hoping that would fix things, but it had no effect so the unit went back in the box. At some point recently I learned that there are inexpensive power supplies available for early Powerbooks, so I got one on Amazon for $10 and tried it out. Amazingly, I was greeted by the comforting early Macintosh startup chime, and the screen lit up for a brief moment before going dark, and then all of the pixels on the display smushed over to the right side of the screen.

Clearly there’s something amiss with the display, and from what the Interwebs say it’s a pretty common thing for the capacitors on passive-matrix grayscale monitors to fail, leading to these issues. I contacted a guy who streamed a repair live to see what he’d charge to fix it; we’ll see if he gets back to me.

Update: there are several videos on how to disassemble and recap the display online; given that I don’t have a lot of winter projects lined up, this is something I’ll tackle myself. I’d need a sharper soldering iron and the proper solder, but this isn’t anything I’m particularly scared of. The problem is that several of the capacitors aren’t in stock at Mouser or Digikey, so I’ll have to revisit this project in the summertime.

I also think I’ve got an old Powerbook Display Adapter in my antique computer bin somewhere; I’ll have to dig it out today and see if I can hook the unit to a monitor for testing.

Date posted: January 14, 2022 | Filed under apple, geek | Leave a Comment »

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