You are correct. The one linked to is the main board. I tore the unit down just to see what was what. Frikkin Apple/Chinese Origami mofos!! The unit splits at the bottom but not at the top... you have to hold the bottom open with pressure and slide the unit out while feeding the power cable thru the slot.
Now I can see if there are any loose connection or anything else that may be causing the problem. I thought I would check before ordering the part and also visually match the part with what I order.
Thanks for your help.