And a good way to test the box for overheating is to go to radio shack and buy a can of the stuff that electronics guys spray on to the circuit of an electronics instrument that they are working on that does not work right when hot... they used to use freon R-12 before it was outlawed.. dont know what they have in the cans now, but it will cool down an electronics object and let it run correctly again so they will know what to replace...