I'm trying to disassemble a Kill-A-Watt P4460. A device that was plugged into it had some electrical problem and caused the circuit breaker in my house to trip. When I removed the Kill-A-Watt from the ac outlet, the ground pin had a nice burn mark on it and now the display is dead. There are three Phillips screws on the back of the unit but one of them appears to have one of those raised points in the center of it which prevent you from putting in a regular bit. I cannot find any security tool in my collection that fits this type of screw. I'm not even sure what to search for online. The screw looks like a torx bit but it only has four notches. Any idea what tool fits this?
Thanks for your reply.