Inside the device (flat screen monitor, in this case), the PC boards are covered with metal enclosures with small holes. Holes for cooling I presume. Small holes to prevent rfi interference I presume, just like the holes in the metal door of a microwave oven. The holes smaller then a microwave, to stop them from passing thru and cooking the people in the kitchen. My question regards the metal PCB cover inside the monitor. Are the holes to prevent interference from getting in or out? Is it a health hazard to use monitor w/o the pcb covers?