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All 4 screws that serve to connect the bottom case to the top case are the same. There is a fifth screw at the back of the machine, near the modem port, which is smaller - do you have that screw?

Where in the case is your remaining screw located? I believe they're all the same (unlike on a Powerbook 180 which has a different screen, where the screws that hold the screen in place are shorter that on a PB 140/145/160; not sure about the PB 170 but I guess it's like the 180). The screws...

I put a 180's screen with moderate tunnel vision in the oven at 98°C for 12 hours. The tunnel vision effect is much slower to appear now, but appear it does (after 30 minutes or so). My conclusion is that the liquid crystals themselves are degraded, and that short of cracking open the panel...

Thanks! That makes it very clear.

Help please: What is a "via"?

Congrats!

Have you tried mounting the screen on a different chassis? I had a screen that appeared half broken (top half with stripes). After I‘d swapped the mother- and daugherboards (from another 160), the screen worked just fine.

The result of this experiment is: The IR lamp does not sufficiently ameliorate the tunnel vision. I'm stopping now. Interestingly, the screen didn't get any worse either, although it's been exposed to a lot of heat. If the tunnel vision effect is really caused by moisture, that moisture...

I've now let it run for 2 x 6 hours. I let the screen cool down and tried it. No change (tunnel vision is still creeping in after a few minutes). Maaaaaybe a bit slower than before. But it has the same extent. So I'll keep toasting the machine.

I could try turning on the Powerbook as its screen is being toasted… what do you think?

Not sure that the desiccator is hot enough to really get the water out. I‘ll continue toasting tomorrow.

Strangely, the screen gets hotter than the bezel. The IR lamp is a 100 W lamp - it's not all that hot. I can still touch the screen (briefly).

It's toasting now. I'm doing the left side first, this is where the worst tunneling is taking place.

145, 145B (both Rev C), 160, 165 screens are all the same. See this myoldmac list.

Thanks! I plan to open the Bezel and disconnect the CCFL cable plug. I understand that there will be a couple hundred Volts (at very low amperage), so I plan to use a CCFL cable from a non-functioning powerbook, plug it in, and cut off the dead CCDL - in this way, I should be able to safely...

OK I'll post my setup once the lamp arrives and is in action. That'll likely make you laugh even more :-D

I don't want to blockade my poor oven for so many days on end - I'm planning to bake a cake (and possibly spare ribs) over the week-end... I'll use a thermometer on the display.

I've decided not to put the LCD back in the oven for what should probably be 7+ days. Instead I'm buying an Infrared lamp and will try heating the screen that way.

So this is the LCD after 2.5 days at 159F in the oven. There is definite improvement (which really surprised me) in the corners: No tunnel effect in the corners at all (and it was really bad, totally black - for example, the Apple symbol in the menu bar was completely indiscernible. But the...

That‘s what I was thinking of. Thus treat the display like fruit chips… fingers x‘ed