Respuesta a "Broke vertical sync cable on reinstall... possible fix?"The V-sync is the first one to try and yes, it is a PITA! Some have just left it disconnected but I managed to flatten the contacts back out and separated them. Still has a little grumble mid-startup but no more grey screen. Just be sure the LCD cable is installed correctly too.
Respuesta a "Broke vertical sync cable on reinstall... possible fix?"Just to resurrect this old thread, I’ve just updated to an SSD in my late2009 21 1/2” imac, (yes, it was still running the original HDD!). I have fat fingers and it took me ages to get it to run again. Anyway, I had exactly the same issue with the vertical sync cable. Bent wires which I managed to straighten again and hey presto! I can actually dismantle the thing with my eyes shut now. :-)