I have an Aria EQ276W monitor which was running fine until this morning. It started to flicker at an increasingly fast rate after getting very bright. Then it got quite dark but still flickered. I disconnected from the graphics card and switched power off then on. The monitor displayed a no signal message but was still flickering so I conclude problem is monitor itself or power brick. I can buy a replacement brick but don't want to unless it make the monitor work. Any ideas?