Hi, welcome to Just answer
If the oven turns on and there is power to the circuit board and is not heating the most common cause is the thermostat going bad and will need replacement
how old is it ?
Hi Kevin, I don't think the oven is even turning on as the display is blank.
Three years old
still I would check the thermostat first, a new one is just £4 and if that is fine then check the circuit board
usually the PCB wont go bad in just a three year old oven
Is the thermostat positioned on the top left of the oven when looking from the front, if it is then there is continuity through it.
Yes its under the top cover with 2 screws and has two wires going into it ... have you checked continuity after removing those wires
Yes I removed both wires and there was zero resistance through it.
as it is not open so seems to be fine
sorry about the bad news... I think it is the control board
Poor Service ? a new one is around £50
Hello My name is Ian ~ I am not on the site constantly so please be patient whilst waiting for responses to you queries ~ before you go to the trouble of getting a new circuit board check out the button cut-outs (not the thermostat) that are fitted to this unit, they will cause the oven to shut down including the display if the temperature goes too high, one of these is a manual reset version which means you have to take off the top cover to reset it.