The Answer I hope is yes. I have a controler board NT68676 2A 1256 which has vga hdmi and dvi-d inputs with audio. a simple 4 button control board plus a cable to go between the controller and LCD panel cost around $30 from ebay.com cost me a bit more as I am in UK. The above controller is normaly use for smaller panels and supplies 12v to power the inverter for the LCD panel. I asked the supplier if I could provide the 24v for the iMac inverter would his controller board be able to handle the signal side of things, he's said it would. I am looking with no luck yet to find the pinout for the power supply as from the work done on earlier versions G5 and 20 inch it would seem I will have to ground 1 pin on power supply to switch it on. if anyone knows the answer or has already done this would be most grateful if you could share it. Update: I have today found this pinout from a power supply in the off state but possibly faulty, so if any one could supply pin out for the on state would be great PIN V 1 GND 2...

Maybe if you glass is only cracked and it still works you could cover it a high quality screen protector for say an iPad.

Just to say if you only need to replace the cable the from the main logic to the Airport card it is very simple after battery disconnect its just pry up logic board connector carefully then peel back tape at airport card and remove cable.

Thats all there is to the cable replacement and it fixed my No wifi hardware found and intermittent wifi which it would seem is a common fault As always a great guide thank you.