Hi I have a cannon Carrick gas cooker the issue I have is a humming or buzzing sound coming from the back it only happens when the power is on. Its not the built in timer/clock but that dont work at all recently stopped diaplaying anything. So if anyone has any ideas let me know im thinking its a relay making the noise and before anyone asks Its not a gas leak as 1 no gas smell and 2 we tested it with gas supply off.