not sure if this is the one with a module in bot left , if it is the module gets a dry joint , you can see it on close inspection of the back of the module, just needs soldering . sometimes its a module replacement only £25 ish from connect
sorry to contradict but i had one only last week where the dry joint was not quite bad enough and on start up the motor intermittently came on for short bursts , on closer inspection you could see the dry joint flashing
i have had that also where the machine will sit for seconds , then ramps to whatever speed it should be doing as the dry joint arcs across.
i think it is this machine with the module,
i think it is all the hoover se machines.
also worth checking the brushes if it is a dry joint i tend to find them either dead or very poorly looking 😉
but i have to say if i go out to a hoover these days first thing i do is check the little red wire where it enters the taco usually pull straight out.