Apparently this was a known problem on the Samsung Model RF4287HAWP/XAA OR HABP/XAA. The control harness leading to the draw is part of the rail slide assembly and after 2 years the cable had snapped from regular use (poor design).
So the fix was straight forward once I ordered the part:
1. Remove the draw tray
2. Remove electric harness cover, squeeze and it pops out
3. Disconnect power harness
4. Undo bolts on front left and right of draw - just sheet metal bolts
5. Set draw front aside
6. Remove front l bracket from rail assembly - 2 sheet metal bolts
7. Pull forward both rail assemplies and remove joining tracking bar, slide to right and then it pops out of the other side and remove
8. Remove screw holding in rail (Philips)
9. Disconnect other end of harness which plugs into socket in fridge interior wall
10. Move rail to left and slide forwards, rear is hel in be insert/bayonet
11. Installation is reversal of the above steps
We did have an extended warranty from Best Buy but they would not honor this because they refused to categorize this as a mechanical repair. Technician refused to proceed with repair and said this was a fire hazard ... what a load of rubbish! It took me 1/2 hour surfing to locate the right part, and then 1/2 hour to fix,
Net result, don't be scared, you can do it!