My new Samsung tv not recognising Sky Q box. Says no Signal and check power device

[orionn2o]

Just when you first turn the tv by pressing the sky button on it doesn't detect a signal.

if I then switch inputs or turn the sky box on and off with the tv powered it then runs along happily  

[ste1977]

Hello,

I'm having the same issue. It's only happens after I've been watching channels in UHD EG sky sports . 
The TV I am using is a Samsung Model number is: 

QE55QN85DBTXXU

Software version: T-PTMDDEUC-1301.0 

last time it happened was around 11am this morning. 
It's the main Sky Q 2TB box. Connected by new high gold plated quality fast MDMI. Was also happening with previous MDMI cable. 

[Stuart+Moore]

The quickest work around I've found is go unplug the sky HDMI cable from the TV port then plug it back in.

TV detects new HDMI connection and allows setup.