My tv turns its self off when sky. Box is on

[Tristan1760]

My tv randomly started turning its self off over the last few weeks , the tv is only 2 years old , but I was thinking maybe it's giving up , I've tried lots of on line suggestions regarding the tv with no luck , so start looking for new tv , but just before pressing pay I thought of trying the tv as a smart tv and it stayed on so I then turned the sky q box back on and all seemed ok for a bit then started turning off again, moved and checked the leads and replaced the hdmi seemed good again for a day then started again , I've now rebooted the box and seeing how it goes , has anyone had a similar issue