Cisco C1000 network switch, dead, nothing happens when plugged in. This board was initially loaded with corrosion. I removed the bigger components and cleaned off all the corrosion. I'm sure this was the root cause, so I havent tested anything yet. This board uses an HR1203 (datasheet) (eval board)to control what appears to be the initial step-down from mains voltage. I've followed the traces, and...[Read more]