Flicker Gate

I noticed my SP4 start flickering after using for around 5 months and i noticed that everytime there is something moving on the screen the flicker would stop. At first i could workaround it by putting “seconds” at the clock on the taskbar to keep some activity on the screen. But 3 months later the flickers get worse than before, even though there are something moving on the screen it is still flickering a lot. Please microsoft do something! i have spent a lot of money for this device