http://webobjects.uwaterloo.ca/mac2400/ Hardware:repair:hinges
Hinges
Apparently Ash is the first user to report a complete failure of his
stainless steel screen hinges. After his hinge failure, and
subsequent frustration in finding a set of new hinges at a reasonable
(or unreasonable for that matter) price, he was able to have them
welding back together by a local machine shop. That's when we started
thinking about lubrication.
If you think your hinges might need lubrication we strongly suggest
you stay away from anything that leaves a residue and keep in mind
that in general electronics components and oil don't go together very
well. Lubricants like Dri-Slide or TriFlow are preferred over WD-40
and the like, BUT any type of lubricant puts your electronics at
risk. First, be sure your hinge isn't just loose or binding from
being out of alignment. We're open to suggestions...
Here's what Ash did to remove the hinges:
For disassembly, it's actually quite easy. There are 4 screws total
that hold the display together. Two are underneath the "Macintosh"
and "Powerbook 2400c/180" labels, and the other two are under the
rubber dots at the top of the display.
Once you have the screws out, just pry open the display cover with a
flathead screwdriver, (but do it gently). I've taken it apart a few
times now without any problems
Prolific Sydney explains it this way:
There is an easy DIY fix for this. I just did mine yesterday after
some procrastination (actually when I reexamined the "clicker fix").
Exactly the same problem on one hinge. If there is growing or
excessive free play in the screen swiveling, you should pop off the
1/2" strip above the keyboard (by loosening the two screws hidden
under the plastic caps) and tighten the hinge screw(s) (facing same
side as screen) as well as the two screws on the back of the computer
(visible from outside). I strongly recommend anyone with excessive
free play do this ASAP as the loosened hinge is much more highly
stressed at the screw fixing point. The free play actually comes from
the additional pivoting of the screen tab on the tiny screw which
attaches the hinge in the lower case. Ironically, the very firmness
of the pivoting action further increases the stress on the hinge when
it gets loose. This could lead to the 2400 "broken hinge" syndrome.
(Sidney Ho/21 May 99/DuoL
Quite a bit in the archives on this also.
http://www.mail-archive.com/duolist%40lists.themacintoshguy.com/
Cheers...
On Aug 6, 2005, at 8:02 PM, Scott Strungis wrote:
Hi listers,
My 2400c has developed an annoying click when I open the lid. It
seems to be coming from the left hinge area. I think that the seam for
the plastics on the lid is catching slightly on the back of the laptop
as it opens. I also notice that the left hinge cover has some slight
give to it between its twio halves.
Does anyone else have this trouble? Do I have to worry about my
display cable?
Thanks,
Scott
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Ralph Mawyer, Jr.
San Antonio, Texas
PB2400c/G3-320/112MB/80MB HD/Yu-Plan Keyboard
mac2400 http://www.sineware.com/mac2400
Your PowerBook 2400 Reference Site
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