Yes checked child lock and just taken board off and checked
Connections, all the other buttons work as symbols come up on display except start button, so is it a fault on control board or PCB.
it’s a machine I have in workshop
And will keep it as my own machine,
Try a motor on it or if it’s a China built machine change the brushes had a candy washer doing this a week or so ago and changed brushes and a way to go