Thanks! 😃
Regarding Dolby Vision FEL, I haven't been able to test it with my current setup, so I can't confirm whether it works.
As for the fan noise, the HP EliteDesk 705 G4 SFF is practically silent!
From a distance of about 2 metres, I can't hear it at all. Even when sitting directly in front of the PC, the fan is barely audible.
So in terms of noise, it's absolutely excellent as a living-room HTPC!
And with native 3D Blu-ray frame packing now working under LibreELEC 13, I'm really impressed with this little machine! 👍