I went back to see what the line hiss was on line five. It was their credit card machine. Unplug it and the hiss clears. Ordered them a replacement.

Also found out what else was damaged...several ethernet modular connectors were blown on their servers, hubs and the credit card machine. Its clear they took a hit.

He doesn't want to replace the unit, even after I told him his insurance should be able to cover it.

Considering he's so paranoid if the phones ring more than twice and no one answers, what will he do if the motherboard fails and it takes me an hour to get there and another hour to swap out and reprogram.