Ensure that the electrics is switched on at the wall and the RCD as it may have tripped due to another faulty appliance.
The turntable should move in all cycles (at least on the microwave setting if it is a combi-oven)
LEDs can short and can potentially indicate further issues.
Place a mug of water in the microwave alongside your food to moisten the air and keep contents humid. Do not use metal or foil containers in a microwave.