LCD Screen remains black when lenscap is open

Question

My Megxon Z6 camera which worked perfectly throughout it's 90 day warranty period has developed a problem in which the LCD screen stays black, apart from the white writing and the icons on the screen. The battery is fine. In fact I've tried two different batteries and everything else lights up as they are supposed to (eg the LED light on top of camera and icons on screen) The lens protrudes (as it's supposed to when I slide the open bar) The Lens cap slides back and the icons light up on the black screen. But I can see nothing apart from these icons and date stamp etc on the LCD screen. If I take a picture the flash comes on (even in the brightest light) and the "picture" turns out to be a black rectangle. Help please! Where do I get this fixed?