I'm working on a WAV50-118 that won't power up. When you turn on the key only the presence over ride switch lights up. Power goes to the contactor and the controller when the key is turned on but the contactor won't energize. All the fuses are good but I'm not sure about all the micro switches. I'm not sure which ones are to be open and which ones are to be closeted to operate. I was told the unit was dropped about 2 or 3 feet as they were cleaning it. Everything worked before the dropping incident. Any advice what to check or do you think it could be the contactor?