Samsung tv won’t turn on. The standby light flashes 5xs

Samsung tv won’t turn on. The standby light flashes 5xs

My Samsung tv won’t turn on . The stand by light flashes 5xs and I then hear a faint click. I have taken off the back of the tv and none of the capacitors are bulging. I disconnected the main board from the power board and plugged it in and could see light coming through the screws. I am assuming that this means the power board is good. Should I try replacing the main board? The model # UN65JU670DFXZA.