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| PowerBook LCD replacements: THE HUNT! |
Posted by: Trash80toHP_Mini on 2018-01-23 08:09:02
I'll start off with the 150 [😉] Pricing is in the Atari addict range though . . . :mellow:
PowerBook 150: the Panel in mine is a Casio MD800TT10-C1 which seems to be in production:
https://www.alibaba.com/product-detail/Original-CASIO-9-4-inch-LCD_60589411286.html
https://www.ebay.com/itm/1PC-Display-MD800TT10-C1-a-Si-STN-LCD-Panel-9-4-640-480-for-Ortustech/332421057201
PowerBook 100: the panel from my first laptop is a SHARP LM64P791 and one of my beat up part donors has a deteriorated
Search came up with nothing so far, but oddly enough I did find a 10.4" SHARP LM6464P791 Very strange, but they may come up:
https://www.elecok.com/lm64p791-sharp-10-4-lcd.html
http://www.displaysscreen.com/original-lm64p791-sharp-screen-104-640480-lm64p791-display-p-4723.html
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It's already looking like the replacement panel safari will be a rich man's game, but new screens may a better alternative than sourcing donors in the PartsBook category. I'm wondering if plasticizer leaching within the close confines of a closed PowerBook over many years may be the culprit? If they're worried about the effects of leaching on drugs and foods for human consumption stored in containers within their expiration dates, multiple years of it concerns me. Dunno, but it seems to me it wouldn't take much to eat away at thin film plastics and adhesives? The variety of storage situations across environments and continents has made this my primary suspect.
The hunt is on! So if you're working inside a lid or recapping a panel, please add the panel's model number to this list if you don't see it. Don't assume your panel is already listed because the PowerBook is already in this database. Apple used multiple suppliers for many parts and the model numbers for the same form factor/spec panel from a single supplier may have changed during production runs of PowerBooks, even as short as they were.
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Posted by: digitalrampage on 2018-01-24 18:05:51
This is awesome mate. Good work. Expensive, but good to know I have an option |
Posted by: AlpineRaven on 2018-01-25 13:56:38
Good to know!
Cheers
AP
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Posted by: Trash80toHP_Mini on 2018-01-25 14:26:35
De nada, mates. Lete everyone add more LDC modle numbers to the database whenever we've got lids open, that'll allow searching possibilities w/o the lid cracking hassle. [😉]
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Posted by: Alex on 2018-01-26 03:22:54
Is the Alibaba display compatible with the 150? How did you come to a positive conclusion if it is?
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Posted by: Trash80toHP_Mini on 2018-01-26 10:23:25
I haven't, what I said was that it's the same model number as mine and that it seems to be in production. Not in front of me now, but ISTR it's a dead ringer for mine. Luckily it was used in a standard touch panel from ORTUSTEC, which may have been widely deployed in older copiers or the like. No other results came up in that search, YMMV. The PB100 model number coming up for two different panels is probably a fluke. We'll see if it's statistically significant as more PB LCD models are documented and searched.
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Posted by: Trash80toHP_Mini on 2018-01-26 10:32:07
PB165c: Mine is a SHARP LM64C06P - could be Cap O or Zero, no contextual differentiation clues available in the serial number
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Posted by: trag on 2018-01-26 12:22:43
LCD for the Outbound Laptop Model 125 is LM64135, for what it's worth.  There are some on Ebay, but htey're $465 with shipping. Ouch.
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Posted by: demik on 2020-04-27 17:10:46
PB165c: Mine is a SHARP LM64C06P - could be Cap O or Zero, no contextual differentiation clues available in the serial number Same on mine, it's a zero, so LM64C06P 🙂
Very hard to find... Found one on aliexpress but I dont get if it's new or not:
https://fr.aliexpress.com/item/32902891813.html
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Posted by: techknight on 2020-04-30 11:34:02
I think going forward to preserve/use these machines as the original LCDs start becoming unusable, is to create some type of timing adapter PCB using an FPGA or something along those lines to adapt the old parallel signalling into a more modern LVDS interface for newer displays, or even to adapt to a different type of monochrome/color display that is more readily available IF it fits within the bezel properly.Â
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Posted by: demik on 2020-04-30 12:27:16
I though about that for the 165c. I found close matches, but not compatible enough.
The usual problem is the screen resolution: 640x400.
Almost all screens are 640x480. The closest thing doable is putting 1280x800 screens (9-10" are comonly avaible) and going fat pixel (one pixel on the mac is 2x2 pixels on the screen). This should be doable with an FPGA, as you suggested.
BTW, I bough the screen above for my 165c, we will see how it works. (seller has 100+ of them left).Â
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Posted by: techknight on 2020-05-01 05:06:31
Yea, at that point your getting into integer scaling. Not sure if you can do that in real time. Maybe.Â
Otherwise, you would need a bit of SDRAM to buffer the incoming signal, and then scan/refresh the read-in frame onto the target display. However, you would be a couple of frames behind at that point.Â
Unless you can somehow manipulate in real time pixel by pixel the scaling.Â
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Posted by: demik on 2020-05-02 02:59:28
Yea, at that point your getting into integer scaling. Not sure if you can do that in real time. Maybe.Â
Otherwise, you would need a bit of SDRAM to buffer the incoming signal, and then scan/refresh the read-in frame onto the target display. However, you would be a couple of frames behind at that point.Â
Unless you can somehow manipulate in real time pixel by pixel the scaling. Yeah, that was a bit of thinking out loud. I don't know how to do it in digital, but scaling in analog (VGA & friends) is easy :
- Slow down the pixel clock by two, but keep the sync timings right
- Repeat each line twice
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