Powerbook 100 - weird display issue

[JRL]

Hi, 

In the middle of fixing two Powerbook 100s and I ran into a weird problem that one has...

Recapped the LCD/mainboard of one PB 100 completely and it seems to work fine with good LCD output (dead HD of course) but whenever I try to boot from a floppy it seeks once fine and then the display goes to black. The LCD backlight stays on and operation seems normal (similar to the behavior of the LCD pre-recap), and the PB continues to boot from the floppy as normal.

I would think that this is a problem with my lcd but I tested it with the other Powerbook 100 motherboard and it works fine. 

Has anybody had issues like this before? Thanks!

 

[Byrd]

Hows the power adapter - all checks out OK?

 

[JRL]

Oh shoot that's something I should have thought of, thanks!

I'm trying to crack open one of the 2 supplies I have but I'm having trouble doing so - did you have any tips?

-J

 

[bibilit]

There is a post somewhere about cracking those ones, in short you need a vice and two rods to get the job done.

 

[MJ313]

 

[JRL]

Recapping both of my power supplies fixed this problem! I found it a bit easier to crack open the supply by shoving a flathead screwdriver in the crack of the case between the power cord and ridge, came out a bit more cleanly.

 

[MOS8_030]

Good information. I have a Portable power supply that I believe needs work.