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shifuimam in ibookmod

Upgrading a clamshell iBook to XGA (1024x768) - Open Firmware hack

What you need for the LCD upgrade project:
This is a list of components known to work. You may try other parts if you like.

  1. LG display data cable, Apple part #922-5368. You can order one of these through your local certified Apple resale/repair shop - go to Apple.com to find one near you. This part has officially been discontinued by Apple and all remaining stock at official resale and repair locations has been discarded. You will need to look for this cable elsehwere - eBay is probably a good start. You can also solder the wires from the original cable to the pins on the Samsung LCD's display connector.

  2. 12" Samsung LCD from an Apple laptop, model number LTN121X1-L02. The Philips LG LP121X04 is also known to work. These are confirmed to be found in 12" G3 and G4 white iBooks. Nobody's pulled one from a 12" PowerBook, but we're pretty sure it's the same model.

  3. Clamshell logic board with FireWire - these are the only boards with the upgraded 8MB ATI video chip that is known to output 1024x768 (XGA) resolution. Older boards (300 and 366MHz) may or may not work. The 466Mhz boards were only in the DVD-capable graphite and key lime clamshells.

  4. Latest firmware update - this is necessary for the resolution hack to work! You should be able to download from Apple's website. Don't ask me how to update it - I don't know, since my iBook had the latest firmware when I bought it on eBay.

How to actually do the firmware edit:

Hold down Cmd+Opt+O+F and boot up your computer. This will open up the Open Firmware (OF) console.

Type in the following commands (new line means hit enter). Make certain you're typing it in correctly - a missed keystroke could render your computer unusable (maybe). Just be careful.

dev /
3 encode-int " display-family" property

Hit Ctrl+C to quit the NVRAM editor.

setenv use-nvramrc? true

You should have working XGA resolution now. If you don't, PLEASE at least take a quick look at pages 6 and 7 of this thread for possible troubleshooting tips. Still having trouble? Post as many details as you can so we can help you!

If you think you've messed up the NVRAM edits at all, hold down Cmd+Option+P+R to reset the PRAM entirely. This will remove all NVRAM edits and the code that directs Open Firmware to use the custom NVRAM file when booting.


Re: Howto


Unfortunately, I didn't take pics when I did mine (and I don't want to rip apart the case for the umpteenth time).

It's pretty easy. You just need the right cable and the right display. You need to get an XGA display that matches the Samsung or LG part number listed in the guide - others might have the same connector but a different pinout, and you risk frying your board, cable, and/or display if you don't get the right model.

The new screen won't fit exactly. I ended up bending the original screen bracket a bit to position the screen, and I think I used some foam or something to wedge in between the screen and the case, to keep it from moving. It's certainly not an exact science - you'll just have to mess with it a bit to make it work.

I do understand about trying to filter out the useful stuff. I'll try to update this guide more as people start needing certain details. For now, I just copied it directly from the original post on the MacNN thread.

If you decide to do this mod, please take pics! I can host them for you if you need me to, on my Flickr Pro account. I might try to upres another clamshell (a 300MHz) - if I do, I'll be sure to take pics.

Sorry for the delayed response!!

Re: Howto

That sounds easy! But since a few weeks I try to get the cable...Apple does not offer it any more (only in Germany or Europe?) und AllMac is out of stock...

So, I have to get it used...but I don't know wich iBooks used this Cable?
The screen was no problem.

If I get it, I will take photos!

Thank you!

Re: Howto

The cable comes from the same clamshell iBooks - it's only found in those that shipped with LG screens, so you pretty much have to buy it separate, since not many clamshells were fitted with the LG displays.

The cable costs about $22 USD - if you'd like, I can buy it for you and mail it over to you (mailing stuff overseas through the US postal service is really cheap - it'll only cost another $1.50 or so to mail it), and you can pay me via PayPal for it. If you want to do that, you can contact me on AIM, MSN, Yahoo!, or Google Talk via shifuimam.

Edited at 2008-04-23 12:10 pm (UTC)


Re: Howto

so you say that you need the cable and xga screen?


Re: Howto

just trying to figure when connecting the wga screen how to connect it
and what to i have the lg cord, in fact i have two, but i"m stuck on how to connect thw xga screen and how to get the lg cord back through those hooks ..


Re: Howto

need pitures got the cable and the screen, just need to figure what i"m connecting as far as the screen, and then the cable is long
iBook Mod

April 2013



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