If your refrigerator is dripping water on the floor, the problem is likely a clogged drain line. The video shows how to fix it. The pictures and comments, below, give a summary.
Step 1: Remove Bottom Ice
Open fridge and freezer. Pull out both freezer drawers. Pound bottom ice sheet with fist. Remove ice chunks.
Step 2: Open Problem Area
Take off two side rails, ice maker, and back panel.
Step 3: Chip and Melt Ice
Use a steak knife to chip out ice. Don't puncture cooling tubes. Use a hair dryer to melt open the drain. Fixed!