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Fan swap cleared the problem. I then tried a modern replacement, an Arctic F8 silent. While I didn’t have fold over, there was a general constant  flickering of the crt. Again everything looks great and solid with no fan. So going back to the original fan, I added a snubber cap across the fan...

You’re right - this was a big issue on my first color classic - I had all sorts of video problems before figuring that out. on this one I went over all the grounding points when I first discovered the problem.

I’m going to try a fan swap. I had limited success (Improvement, but not elimination) with a foil shield between the fan and the analog board. i may also try adding a suppressor cap across the fan terminals. i didn’t try external power for the fan, but I did try using clip leads to power the...

I’ve now isolated the issue to the fan. If I pop the fan out of back, there’s no fold over, even with the back on. I’ve tried insulating the metal frame of the fan in case it was touching anything. No effect - fold over when the back was on. I then disconnected the fan wire, but leaving the fan...

Hey all, I’m having trouble sort something out. I’m finishing up a nice color classic - stock logic and analog board, nothing crazy. with the case closed there are one or two scan lines at the top that are folded over. When I pop the case, shifting the CC forward, the crt slowly corrects...

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...

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...

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

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...

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

Here are photos from three different attempts at reassembly.

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...

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...

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...

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...

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.

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.

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.

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...

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...