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I did try for a lower temperature for 9 hours (85 - 90 celsius) and it had zero impact....my panel tunneled at the same time interval. I saw another YouTuber (channel name: i80386sx) try it at the higher 100 celcius for 4+ hours and his worked, plus he had a 6 months follow up video where it was...

Mine has been working now for about 8 months since I baked it (4-5 hours at 100 celsius) and I have been leaving it on for up to 8 hours and no ill effects. The baking left no traces of the old tunnel vision. The attached pictures shows the before... The after is just a normal picture and...

Here is a video of my PowerBook 180 about 6 months after having been baked at 100 degree celcius for 5 hours. I can leave it on for hours and no tunneling. It has not been specially stored/sealed in a dry place. You do see a bit of flicker on the left on all-black background...I'm wondering if...

If it is moisture, why does it spread from the outside to almost the entire screen if left on long enough? Wouldn't there be constant volume and it could only impact its area?

It's only been about 2 1/2 months since I baked my PowerBook 180's screen (5 hours 100 degrees celcius), but since I recently brought it out again to try my newly acquired external monitor cable with RGB-VGA converter, I got to see my screen after sitting on the shelf all that time. I had the...

I'm so glad you had these. I recently bought a UnimacFly for $4 on eBay but no sticker so I was desperately trying to figure out its setting. Looks like the VGA setting did the trick for my PB180. Pretty neat to get a color display, plus I can close the lid, stick a keyboard and mouse on it and...

I only used the screen as well.

Did it have tunnel vision? Another experimented I wanted to try, before baking it, was to put it in a refrigerator and have it turned on for an hour to see if cooler temperatures would affect the tunnel vision. This could then lead to either adhesive separating as it warms up or TFT transistor...

My screen did not seem to change in appearance, just no more tunnel vision (PB 180).

That's exactly what I did...for about 5 hours. I think my temperature fluctuated a little less since we put pizza stones in the oven, which helped keep the heat. I first tried it for longer at lower temperatures (85 celcius) and found that it didn't do the job but the higher temp at shorter time...

Cool. What temperature did you bake it at and for how long? It's been about 2 months since I baked mine so I want to wait longer before I test to see how it currently is. Just stored on a shelf normally so if it's moisture related (I'm hesitant to believe that) then the screen should get to its...

Thank you @Daniel Hansen & @retr01, those lists are informative. What are all the PowerBooks impacted by this besides the 170 and 180? Btw, I find this resource really good: https://oldcrap.org/apple-macintosh-powerbooks-100-series Looks like the Hosiden screens were manufactured in Japan...

Maybe a correlating attribute could be serial numbers of the actual PowerBooks, as that would avoid anyone not feeling comfortable taking their machines apart to still contribute to some data.

Yeah, my PowerBook 180 was also very well kept. Other than the missing back door, which was actually in the advert but the seller misplaced it (and I believe the hinges were actually good but for some reason it popped off) the unit is pristine. There are no scratches on it, the SCSI hard disk...

So I've been thinking about the screen behavior and the moisture theory. So on mine, before the 212 bake has for now fixed it, my screen would be ok for 15-20 minutes and then start to deteriorate. After an hour it was noticeable on all four corners. After 90 minutes, even more so. I even left...

That may not have been enough but curious what you get.

No one is suggesting that moisture has nothing to do with it. However, it seems that baking the LCD's isn't juts about driving the moisture out, because 10 hours at 185-190 should have had some impact and it didn't for me. When I then re-tried it at 215-220 it worked, and worked really well --...

Oh, so heating could liquify/re-energize the sealing compound...so maybe that's what's going on with baking...

I'm not willing to try that, but if someone has a broken LCD (maybe a crack in it) with tunneling, please give that a try.

Well, the electronics aren't included here, only the panel...although in YouTuber i80386sx's approach, his TFT (for a PC laptop) had part of the electronics still attached which he covered with aluminum.