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christie

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About christie

  1. christie

    Trackball roller replacement material

    Well that would be turning the problem inside out, wouldn't it? I just did a roller transplant from my parts 180 to a portable. Pretty straightforward process as long as you disassemble the trackball pcb from the housing. This lets you slide the rollers off by lightly drawing the axles backwards, compressing the spring rather than trying to stretch the axles forward, risking bending them, popping and losing the springs, etc. Reattach the same way. Once the rollers are off you can just soak them in a dish of water - nothing stronger is really needed if you just let them soak. This poses minimal chemical risk to the probably silicone material of the PowerBook roller. It's hard to say exactly, since the portable roller clearly deforms with time, possibly including shrinking, but the PowerBook roller fits really well, has approximately, if not the same inner and outer diameters, and is probably a bit longer than the portable roller. It still fits fine within the channel of the plastic housing however. One more little gotcha, the pcb is held to the housing by what appear to be self tapping screws, so when reassembling, it's wise to back drive them until you hear the threads click into alignment and then lightly screw them in. This lets you reuse the threads in the plastic and not tear them up. What a joy using the portable with clean, trued, round rollers. No more constant flicking and reflicking to overcome the out-of-round originals. You're aware of the big gross aggravation when the pointer is stuck, but you don't really realize the almost unconscious irritation of the old rollers until it's gone. Now, to find some more wrecked donor PowerBooks with intact rollers...
  2. Hi all, Spent some time going through the forum posts today here and elsewhere, as well as slogging through the McMaster catalog... Has anyone found a good source for roller replacement for 1xx PowerBooks and the Portable? I haven't turned anything up yet. Seems to be more of a portable issue - the PowerBooks material seems like it's silicone based with a pretty long life, there the issue seems to be about scarring from overzealous cleaning some time in its past. The portables on the other hand seem to be a urethane or natural rubber which deforms over time... I know I can harvest rollers from already dead or FUBAR PowerBooks but I only have one of those, and a few sets of rollers I'd like to replace...
  3. christie

    Portable Preventative Maintenance

    Yes, I read your thread on the subject. Does the metal inside those clutch assemblies commonly need to be stripped and lubed?
  4. christie

    180 (and other lcd, I gues) reassembly

    Yep, I think I'll try clamping tomorrow. I've got nothing good to lose and maybe something to learn from this display at this point...
  5. christie

    180 (and other lcd, I gues) reassembly

    Thanks. They stayed attached to the glass through the whole process, only came off the PCB. So, what now?
  6. christie

    180 (and other lcd, I gues) reassembly

    Here are photos from three different attempts at reassembly.
  7. Hi all, I know about the importance of re-capping, using correct batteries and power supplies, and sorting out the stock hard drives on the portables. Aside from those and the typical keyboard & trackball filth and mechanical issues, what else "should" be done generally on a portable? Off the top of my head I wonder about two things - I've read about the frailty of the 5126 video cable. Can this be reinforced somehow? At what points and with what? Does the hinge or clutches need to be degreased and lubricated like on PowerBooks or is it a self lubricating plastic assembly? What else? Thanks!
  8. christie

    180 (and other lcd, I gues) reassembly

    Well, After several times trying to clean and reassemble, the display is still drawing patterns of horizontal and vertical lines. Some other technique aside from cleaning the zebra stripe with alcohol and refastening the panel to board needs to happen. While this particular panel was a test article from a parts machine, it's frustrating long term. It suggests that after using any of the desiccation methods to clear tunnel-vision, re-sealing the glass edges is not a real possibility. Any ideas?
  9. christie

    180 (and other lcd, I gues) reassembly

    Yep, zebra stripe elastomeric strips. Using denatured right now. Hope it gets right before those metal tabs snap from bending fatigue. Also because even though the data is jumbly, optically the screen is a million times better after the four hour bake, even in the corners. The tunneling was quite bad on this guy. In the future I think the zebra should be cleaned before the bake. Any impurities that were there just got toasted on in the oven...
  10. So today I decided to try baking an lcd on a parts PowerBook 180 I have. Used the "warm" setting of 175 for 4 hours. I did not bake it with the circuit board. I straightened the bent tabs fastening the glass sandwich to the backlight and circuit board. After a decent cool down period I reassembled and tested the lcd. As I feared, lots of vertical black lines and a white ghost outline of the mouse pointer and question mark disk icon. I took it apart again, tried again and similar but different pattern wise results. Before the third time I noticed that there are cross hairs on the circuit board and tiny square etched on one of the glass layers. I figured that they are alignment witness marks and did my best to line everything up and ... Same same. Probably better but not right. Has anyone successfuly reassembled their active matrix display? Everything draw okay? How did you line everything up right? Are those witness marks? I understand that I could have baked it attached to the circuit board, but if it was a really successfull bake, I'd want to be able to reseal the glass edges and for that it HAS to come off the board. Thanks!
  11. christie

    180 Backlight

    No, I do not. Made a preliminary attempt to crack the brick open to recap it but so far it's resisting my efforts. I switched to a recent 7.5v 2A supply until I can get that one (or another) open.
  12. christie

    180 Backlight

    So for the last two days, it has been functioning fine - normal backlight behavior. I have no idea why it started acting up and therefore no idea why it's fine. Thanks to all who contributed suggestions.
  13. christie

    180 Backlight

    That's interesting. I will try that when I have it open. I did play with booting it with the slider set to different positions, and with different prefs set for dimming, thinking something software-wise was borking it, since it's fine before some point during boot.
  14. christie

    180 Backlight

    Yeah, I was thinking that too. I repeated booting it a bunch of times. Several times the backlight stayed on fine. Several times it didn't. The timing of when it went down wasn't always consistent with what the action on the screen was. It was consistent, however with when the hard drive started spinning up. I find this curious. I wonder if it is possible that the hard drive is starting to go south, and when a lot of current is needed to get it going, it tanks the power needed to keep the backlight on? Anyone think this is possible?
  15. christie

    180 Backlight

    Hi all, Have a new-to-me PowerBook 180. Working fine, screen's great... until now. The backlight comes on at boot, stays on when the mouse pointer appears and sometime around happy Mac and the 7.1 Welcome to Macintosh the backlight goes off. Lcd is fine, just no backlight. Where do I start tracking this down? Seems weird that the backlight comes on, string and bright and then goes down during boot.. Thanks!
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