PowerBook 150 - screens all destroyed?!

[Unknown_K]

What did you clean the displays with before they were put on the shelf?

 

[digitalrampage]

What did you clean the displays with before they were put on the shelf?

Nothing, they are in original condition from three sources. Have not serviced these yet. Completely untouched and the storage conditions are the same for all of my PB 100 series, only the 150's are affected.

 

[PB145B]

Man that sucks! My Compaq Contura 4/25 had this same problem when I got it but I managed to find an NOS LCD panel for it.

 

[techknight]

These things were stored in extremely high temperatures for an extended period of time. No doubt about it. This is what happens to the LCDs from that. This probably caused the adhesive to break down over time. The reason why I am saying heat is because if you take a heatgun to an LCD which I have before (out of nefariousness), you get the same results. 

I remember seeing this on some other powerbooks on ebay. 

Edit: Ah, here is one: https://www.ebay.com/itm/VINTAGE-MACKINTOSH-POWERBOOK-140-USED-UNTESTED/330785443351?hash=item4d04594e17:g:uK8AAOSw5dNWqjlA

Similar deal. 

Good news is, you can get replacement polarizing film with adhesive. It isnt cheap but its doable and easily fixed if your careful. 

 

[techgeek]

I feel for you! Had the same experience a few days ago. Happened to my PB 2300c, 520c, 230 duo and surprise, surprise my PB G3 Lombard. Will try to attach pictures later this week. They were all stored at a normal room temperature with the dehumidifier constantly running. Interestingly, I also have quite a few vintage PC laptops (mostly Toshibas from the same time period) some even stored in the same cabinets, but they seem to be perfectly fine! I searched various forums, but couldn't find much information about this phenomenon. 

 

[techknight]

I think it all depends on their previous life and exposures. I know alot of the PB170/180 machines had tunneling, but mine does NOT so it may have been stored differently. But its hard to say. 

 

[PB145B]

Good news is, you can get replacement polarizing film with adhesive. It isnt cheap but its doable and easily fixed if your careful. 

Cool! I still have the old display from my Compaq Contura so I may try this. 

 

[Byrd]

I think it all depends on their previous life and exposures. I know alot of the PB170/180 machines had tunneling, but mine does NOT so it may have been stored differently.

Reckon it's just down to hours of use; the CCFL gases wear out either end like any other household CCFL when used extensively.

You're right on the polarising film; had a quick look and a small 5 - 10cm x 10cm sheet is $35 - 50.  I wonder if a donor LCD could be used, for example from a cheap generic laptop, cut down?

 

[techknight]

"peeling" the film will ruin it. I have tried to re-use old polerizing film, and itll develop lines and marks from "peeling" and the inconsistent remaining adhesive will cause optical obstructions. 

 

[digitalrampage]

"peeling" the film will ruin it. I have tried to re-use old polerizing film, and itll develop lines and marks from "peeling" and the inconsistent remaining adhesive will cause optical obstructions. 

Found a 145 at the office yesterday, exactly the same issue as my 150's. It could only be humidity related, three separate locations, all with the same.

Surely there must be a way to remove, clear off the old adhesive and even just sit the polariser over the top?

 

[Byrd]

Poor man's fix: peel off polariser, then wear glasses with polarising film (DIY) :-/

 

[techgeek]

Hi guys, I am sorry it took me so long to take the pictures I promised, but here they are. My collection of powerbooks was kept in two different rooms with our dehumidifier running all the time, because of a health condition. Since I am a chemist, it never even crossed my mind to clean the screens with solvents, so this can't be the reason for the excessive damage. Since last time I checked, the PB520 and Duo 2300c screens got even worse. The bright spot on the Duo 230 screen is not a flash light reflection, it is a polarizer damage. Any ideas of what might been causing the polarizer deterioration?

 

[Trash80toHP_Mini]

YOWCH! Can you see the damage when the 'Books are powered down or do I need to go through my collection and test under power  .  .  .  those that'll power up. :/

 

[digitalrampage]

YOWCH! Can you see the damage when the 'Books are powered down or do I need to go through my collection and test under power  .  .  .  those that'll power up. :/

You can see it when off.

 

[digitalrampage]

Hi guys, I am sorry it took me so long to take the pictures I promised, but here they are. My collection of powerbooks was kept in two different rooms with our dehumidifier running all the time, because of a health condition. Since I am a chemist, it never even crossed my mind to clean the screens with solvents, so this can't be the reason for the excessive damage. Since last time I checked, the PB520 and Duo 2300c screens got even worse. The bright spot on the Duo 230 screen is not a flash light reflection, it is a polarizer damage. Any ideas of what might been causing the polarizer deterioration?

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Wow, just as bad.. Worse on some. Its like a bacterial growth. The last one certainly looks like mould, but I have a 180c with that "cracked" plastic too. Clearly something bad is going on =(

 

[techknight]

Crazy. I need to go through all of mine and double check everything. 

 

[techgeek]

YOWCH! Can you see the damage when the 'Books are powered down or do I need to go through my collection and test under power  .  .  .  those that'll power up. :/

Yes, you can see it on the Duo 230 - it looks as a slightly discolored area, but if I have not turned it on I may have not noticed it. On the PB G3 no way to tell - it is only visible when it is on.

 

[techgeek]

I have a few more which screens are still OK, but I am worried that these too will fail. I wonder if I should stop collecting powerbooks and collect only desktops from now on.

 

[PB145B]

I have a few more which screens are still OK, but I am worried that these too will fail. I wonder if I should stop collecting powerbooks and collect only desktops from now on.

Why not buy some new film and see if you can fix them? That’s what I’d do.

 

[techknight]

Heres another one: 

https://www.ebay.com/itm/Apple-Macintosh-PowerBook-100-Laptop-Computer-Vintage-1991-UNTESTED/282652506188?hash=item41cf66f84c:g:dmAAAOSw1uRZuczT

exhibiting the same sort of issues.