I'm not to sure about phillips because i work with Sony's but try this.When the tv turns off check the standby light, Does it flash ? If it does its a fault with the set and giving the engineer a fault code to help them find the problem. If it was a brand new set (not ex display) then the factory default setting would not be set to turn off in 5 mins as every1 would be complaining about the same problem. Hope this helps.


Regards Daryl