A monitor has a rear panel formed by injection molding plastic around a metal cooling element. The monitor includes a display panel, control electronics, a module support, and a monitor housing. The housing includes a front frame, the cooling element and a rear panel frame. The cooling element has cooling ducts formed between cooling fins. The rear housing panel frame has fin extensions that extend the fins of the cooling element into the rear housing panel frame. The display panel attaches to one side of the module support, while the control electronics attach to the other side. The front frame and the rear panel frame screw together, and the display panel and control electronics are clamped between the front frame and the rear panel frame. The monitor can be attached to a vehicle by slipping a retaining member into a T-shaped duct formed between two fins on the cooling element.