Original post by: Brett Hartt ,
Hey there Matthew. Unfortunately, the LCD cables are not consistent across iMac models. Also, the LCD cable is part of the LCD itself, so you would not be able to replace the cable independently. When you first turned the iMac on, was the display completely blank? Or was it just white? Sometimes it takes a while for the iMac to boot up after disassembly and during that time, the screen will just remain white.