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PowerBook 180 tunnel bake aftermath
Posted by: croissantking on 2023-11-14 09:11:46 Good thing they stack nicely.
Posted by: croissantking on 2023-11-15 11:33:20 I got my 180 and have been taking it apart to inspect. I love this part. Only very minimal corrosion from the battery this time. Almost negligible. Clean, not too many broken standoffs. Just the usual amount. 4MB RAM card, 80MB HD. Nice - if they work. Wait, what’s happened to the CPU? 😵
Posted by: 3lectr1cPPC on 2023-11-15 12:27:13 Hah! Is that still connected? Doesn’t look that bad surprisingly. May just need some solder touch ups.
Posted by: croissantking on 2023-11-15 12:30:58 It looks connected, just twisted. Not sure how that would have happened - almost seems like vandalism but then nothing else looks out of place.
Posted by: Sideburn on 2023-11-15 14:34:05 I am thinking about replacing the layers of sticky polarizing film on the 180's LCD as is being discussed here: https://68kmla.org/bb/index.php?thr...book-145b-screen-polarizer.40533/#post-508082 Meanwhile, I bought another 180 off eBay for a good price, so I'll have another screen to play with. This will be my 5th 100-series PowerBook purchase. I don’t think it’s the zebra strips…
Posted by: croissantking on 2023-11-15 14:48:52 I don’t think it’s the zebra strips… Sorry what do you mean?
Posted by: croissantking on 2023-11-15 19:26:28 I tried to boot the PowerBook as-is, but it wouldn’t boot and some of the components (a diode, transistor and inductor) on the main logic board overheated and melted the plastic sheet below. This has happened to me before. So, I dismantled it again and tried the parts individually in my working 165. The processor daughtercard works just fine, along with the RAM. The hard drive is stone cold dead, not even an attempt to spin. The floppy I didn’t try and the screen… well… It tunnels FAST. Way quicker than my other one did. The machine has a musty, damp smell about it so I wonder if that somehow reinforces the moisture theory. With the screen off you can see how the panel restores itself from the outside in.
Posted by: 3lectr1cPPC on 2023-11-15 19:28:15 That definitely adds merit to the moisture theory in my opinion. I’ll add that my 170 was probably the best stored computer I’ve gotten in, judging off the smell. My guess is that it was stored in a climate controlled area/closet in its bag. No tunnel vision.
Posted by: Sideburn on 2023-11-18 14:56:58 Sorry what do you mean? The white rubber conductive strips on the lcd glass
Posted by: croissantking on 2023-11-18 14:58:32 The white rubber conductive strips on the lcd glass Ah, but I was talking about the polarizing film that covers the whole display. It's been damaged during baking.
Posted by: imactheknife on 2023-11-18 17:32:21 View attachment 65229 I got my 180 and have been taking it apart to inspect. I love this part. Only very minimal corrosion from the battery this time. Almost negligible. Clean, not too many broken standoffs. Just the usual amount. 4MB RAM card, 80MB HD. Nice - if they work. Wait, what’s happened to the CPU? 😵 View attachment 65230 Someone pressed down with their thumb when inside of it doing something at some point, crazy..
Posted by: croissantking on 2023-11-19 02:41:52 Someone pressed down with their thumb when inside of it doing something at some point, crazy.. Yep, it must be this, but wouldn’t that take an insane amount of force?
Posted by: croissantking on 2023-11-24 02:32:33 So I was playing around with my baked screen again and I’m actually happy with the improved runtime before the corners darken. The baking has made it a more functional display. I’ll probably go for another round and see if I can clear up the symptoms completely. I just hope it doesn’t delaminate too bad. Meanwhile, I saw this alert: Found it interesting - especially the part about having to leave it in sleep proportional to the amount of time it was on. It’s similar to the way the tunnelling needs time to reset.
Posted by: croissantking on 2025-02-07 01:15:31 So this was the first LCD after I finished baking it. I have been using it on and off a fair bit: This photo was taken just after baking in Oct 2023 and at exactly 1 hour’s run time. Now look at this: Same screen, last night; run for an hour (actually 1:04) and no signs of darkening. Seems like this screen has continued to heal after baking.
Posted by: imactheknife on 2025-02-07 18:31:58 So this was the first LCD after I finished baking it. I have been using it on and off a fair bit: View attachment 83161 This photo was taken just after baking in Oct 2023 and at exactly 1 hour’s run time. Now look at this: View attachment 83160 Same screen, last night; run for an hour (actually 1:04) and no signs of darkening. Seems like this screen has continued to heal after baking. Sweet. I have two untouched 180 displays that have tunnel vision. I just dont want to take apart a laptop to test them afterwards lol.. tempted though
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