If theres no power on the display and the mains power is fine then its either the mains filter at the back or the control board.
What you need to do is remove the top and look at the back on the right and you will see the mains filter there. It has the mains cable going into it then you will have another 2 wires coming out going to the control board. If you have a multimeter you can test to make sure you have 240v coming out of that mains filter.
If you do then the control board will be the fault here and will need to be replaced.
If you need anymore info just get back to me.
I did not have a test meter but used a lamp without a plug. power runs to the front board.
I have ordered a used front board/panel.
I will let you know how I get on (if the part arrives in time before I leave my sisters Friday)
Thanks for your techno reply
Ok if theres power going to the control board then it looks like its faulty.
Fingers crossed the new part you get will cure this for you.