We have just became the owners of a 1998 Sundance Optima spa. It was operating when the person we got it from drained the spa because they were not going to use it any more. We moved the spa and refilled it. When we first turned it on the air jets were working. We turned it on again later and nothing was working. WE have replaced the circuit board, topside control panel and the transformer and still cannot get it to do anything. the topside control panel only displays partial readings. Any suggestions as to what we should do next?