Hi, i own a Sony Multiscan g520 CRT Monitor. The monitor is hooked up to my GTX 1070 and has a Displayport to VGA adapter hooked up to it. I just bought this monitor off eBay. It shipped almost brand new and in the original box with great packaging. The monitor turns on and off fine. When i hit the power on the Power LED will stay green for about 15 seconds before turning into a blinking orange/amber color. it will stay that way and the screen remains black. The on screen display buttons do not work as well. Help please.