screen brightness problems

specs: MSI GAMING GeForce GTX 1060 6GB i5 8400 8gb ddr4 GIGABYTE B365M DS3H this is the monitor thats having problems: https://www.bestbuy.com/site/acer-27-led-qhd-freesync-monitor-black/6412841.p?skuId=6412841 the monitor is fairly new, it started with half the screen going completely...