Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
When you cleaned this how long was it unplugged? Are the fans running? If this was unplugged how long has it been plugged back in? Also do you hear any clicking or buzzing coming from behind the refrigerator?
is that the small panel middle right or the big one across the bottom with the vents?
They are not regular screws but hex. I am going to have to get something to take them off. it may take a little while. can I answer back when I get it?