When i start the cycle it drains for a couple of seconds and after that it just stops. Why? No water seems to enter but there is water supply.
Can it perhaps be a faulty thing that opens for the water to come in or perhaps the motor. Pleeeez advise if possible. Its quite an old machine

Jacques peel, October 2016

All dishwashers drain for a few seconds at start of a cycle. Water inlet valve then has to open to allow water to flow in. Once again we have to ask what make & model you are asking about? We don't know if you don't tell us.

Lincoln Appliance NZ, October 2016

You make an accurate diagnosis in my opinion.
It's unlikely to be a problem with the motor that drives the circulation pump - I think that will only run when there's water inside the machine. No water - no wash.

Good Luck..., October 2016