Just wanted to let anyone interested know. The "Magic Board" is the UniMac V4 Adapter. This is available for $49.99 from www.RealMacMods.com To Answer your question: Great job on the EEprom swap, not an easy task. Unfortunately the pinout still needs to be adapted. Chances are (among other issues) the current pinout is connecting your VCC directly ground. Best case it wont work, worst case you get to find out what the insides of a GPU smells like. I can't stress enough, do not try to fit a screen without an adapter to one of these iMacs. You can build an adapter yourself, there should be enough info on the forums to figure it out, but with time and parts you will spend more than $50, and it has a much higher chance of failure. The UniMac V4 adapter simply plugs into the back of the replacement screen. It handles all of the power, ground, and signal mapping. It also handles the EEprom directly. As far as contact, i very rarely get on iFixit anymore. I can be reached anytime via Email Adam@realmacmods.com -...
It is very likely the CCFL in the screen. Not recommended for the novice but if you take apart the LCD panel you will probably find a black soot like substance where the wire connects to the CCFL (the pink or blue or white wires to the actual bulb itself) This comes from running the high voltage electricity through a bad connection from the wire to the bulb. It is creating a high amount of resistance that inverter's safety features are detecting and then shutting it down. If you can successfully extract the bulb it is typically as easy as cleaning up the area and re-soldering the wire / wires. But the bulb is very fragile and i believe contains mercury or something else very not good for you, so its a bad to break it open. Obviously cant guarantee that is the problem but i would be quite surprised if it wasn't.
You can actually use a regular flat head screwdriver on these. You just need to find one that fits in the space, sometimes tap from a hammer or something heavy can wedge the screwdriver in the screw in such a way that you can then turn it. I do this all the time on the security torx that holds the top cover on a ps3.
I know its been a long time, but after multiple shipping snafus i finally got everything i needed to do the PCB. It works perfectly. Multiple CCFL output issue is resolved. Mechanical adaptation requires some modification but i dont think it is beyond your average DIY person's ability. EDID info is stored on 24c02 chip on PCB so no need to remove from screen. No soldering necessary with this PCB. I am going to use this iMac on a daily basis for a little while but based on the past 12 hours i dont foresee any issues. If anyone is interested i can produce more PCB and sell them pretty much at my production cost. i can also make an instructional document for recommended installation procedure.
Just throwing this out there, is it possible that this can be done without the usage of the edid chip? While tracing and marking wires on the LCD cable i intend to use i noticed it did not even contain wires linked to the correct pins to read the edid info. I know most windows based computers if unable to read the info will report it as a generic monitor, but it will still work. of course when apple gets involved you can imagine they hard coded something into the firmware to allow only certain panels, though i cant find anything to confirm this.