Hinges|
hardware
repair page, Dec 14, 2001
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Hinges Keycap Replacement Overheating PC Card Slot Comet ICU Green Light of Death(GLOD)
HingesApparently 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/DuoList)
Key-Cap
Replacementby Jerry Krinock (March 24, 2001)Having had to replace a snapped-off key on my Powerbook 2400 tonight, I have added more detail to the instructions given by other DuoListers. Here are my detailed instructions.
Step 1. As others have advised, if it is still attached, you should remove the white plastic "scissors thingy" ("scissors") from the key cap.Step 2. If necessary, replace the rubber spring. This goes into the hole with the large side down; that is, it is positioned like an inverted bowl. The rim of the bowl goes down inside the hole which holds the spring in, place; squeeze it and work it in with a sharp tool.
Step 3. Position the white scissors. Note that it has four ends. The correct position is:
a) The end with the two legs is the bottom rear (goes on the compute closest the screen).b) The end with the thin bar is the bottom front (goes on the computer closest the trackpad).
c) The end with the three legs is the top rear (goes on the key closest the screen).
d) The end with the wide flat bar is the top front (goes on the key closest the trackpad).
Step 4. Snap on the bottom rear (a).
Step 5. Snap on the bottom front (b).
Step 6. Test the installation by pushing on the scissors; it should go down and then spring back up. Open an application and verify that the computer responds appropriately when you push down on the scissors, as though it were the key.
Step 7. Position the key cap exactly where it should be, and push down while rocking slightly back and forth and side to side, until it snaps into place.
Overheating?Tetsuya Kishino (aka Doggy Fox) has some great pages on the 2400:http://www.ab.aeonnet.ne.jp/~tkishino/index.html (12 Jun 01/rpm)
Here's another...
PC
Card SlotNeed to repair a jammed PC Card Slot check out Tetsuya Kishino site:
http://www.ab.aeonnet.ne.jp/~tkishino/index.html (12 Jun 01/rpm)
CometICU...DuoLister John Mistretta recently brought this new PB 2400 specific site to our attention. The site's author, Jack Belauro, was able to revive John's 2400 after it was put in a coma by plugging in a PC ZIP drive to the SCSI port. Jack has also been able to revive a dead 2400 battery and hopes to publish his approach shortly.
This is an outstanding site and really helps one recognize the effort and knowledge needed to make board level repairs on the 2400. It certainly makes me appreciate Kevin(MCE), Paul(After Hours Consulting) and DT&T even more. :-) (17 Jun 01/rpm)