skylarkjcSorry about the late reply. This sounds like a hardware issue so please get in touch with your local ASUS service.
As shown in attached picture, says that it's not aeroactive cooler, when it's came with the phone, was working for a week then started doing this. It won't light up when X mode is active but it will pass through for charger and headphones.
Any help would be great as I love to keep it on the phone for a stand and to grip the the phone and the obvious cooling it.
Aeroactive cooler not working.