-Performed service call stating all 3 systems thermostats were blank and systems not functioning. Observed repairs being made at nearby power lines when arriving at location. Area experienced stormy weather recently. -Upon arrival, found systems 1 & 2 thermostats blank. Staff states they were able to operate system 3 yesterday. -System 1 blower motor operating upon arrival but thermostat still blank. Verified low voltage at thermostat location. Thermostat in need of replacement. Used Vision Pro 8000 for 2 stage heat pump with auxiliary heat. Matched field wiring to original thermostat. -System 2 transformer breaker was tripped upon arrival. Reset breaker and verified high and low voltage. Unit short cycles with call from thermostat. Found Y2 (compressor 2) contactor shorted and in need of replacement. System operates correctly with contactor replaced. 2 pole 40 A. Y1 contactor was recently replaced. -System 3 operational. -Left thermostats set to cool mode 74 degrees fan on, per s