bosch oven hbn730550b/03

hi…

been to this oven to day and when she puts it on the oven
keeps cutting on and off before it stays on…..

ive had the main pcb out and looked for dry joints,
and made sure the edge connectsions are good…also power going to oven is fine…?
but still the same the relay on board keeps going on and off till she stays on…..

me thinks its the main board but just want to see if anyone eles has had this before….? cos its lots of money….!

thanks 😀

canufixit