I didnt catch the make of your mobo but its all relative anyway.
A lot of times when this happens, the interlock for your ribbon cable isnt completely inserted. You should get a solid double cluck when the long flat ribbon clip lock seats.
The real trick is to hold that keyboard ribbon cable dead on AS you seat the clip lock.
On some older laptops you may discover that simply removing the keyboard has fractured the paper thin metal layer on the face of the mylar cable, in which case doing an exact cut to the insert end of the cable will bring a fresher set of contacts closer to the contact pins inside of the ribbon clip housing. Most ribbon cables allow for this with longer exposed runs of metal.