Driver side door panel not working

I have a 2010 kia sedona ex, today the control panel in my door stopped working suddenly, I can only put the driver's side window down using the panel, i can open and close all the windows using the controls on all the doors except the driver's side, and I cannot lock the doors using either the buttons on the doors or the key fob. What can cause this, and how do I troubleshoot and fix it?