In message , Tim Lamb
writes


I sense a dodgy connection or a dry joint.

Q. Is this a common failure mode?
Is there a specific connector or component that is the most common
source of this problem.
The benefit of your experience is appreciated!

You've found the fault.
You might be able to make a repair with your soldering iron. I've seen
this fault on similar models.

I had a similar fault on a Potterton profile.

It's the same pcb



--
geoff