Guillermo Y Coral Gables , FL September 21, 2018 Appliance: Model LG LAU121CNP Ac was totally dead neither the indoor unit would power on nor the outdoor unit Replaced the pcb board inside the condensing unit. Read More... 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes Tools: Nut Drivers, Pliers, Screwdrivers