I have this Thinkpad x1 laptop that is exhibiting an issue I haven't came across before. When running off the battery no issues but about 5 seconds after you plug in the power adapter, the screen starts to flicker then video cuts out. The back light is still lit and the computer continues to one. I know it is working because when you hit a key you can hear the windows alert. before the laptop was giving to me it was dropped pretty hard but like I said I can charge it fully and use it. I have never came across a power adapter cause=ing an issue like this. I have wondered if its the main board or maybe a reflow may be in order. Any help would be much appreciated