I recently came upon this problem. A couple months back my family purchased a new computer and monitor. I unplugged everything from the old computer and placed it in my room. The problem is that when i plugged everything in and tried turning it on the computer would power on but the monitor wouldn't. the green light would just blink. However when i unplugged the monitor-computer connection the monitor menu would pop up and say there was no connection, so the connection is fine. After unplugging everthing and replugging it back in in different outlets(surge protector) everythign would work fine. It would work fine for a couple more months until now. Out of the blue the same problem started occuring. However this time the monitor would power on and once the desktop appeared it would power off and the light would start blinking again. I tried unplugging and replugging again but it only made it worse. Now the monitor wont start with the computer at all, it just blinks as soon as i turn it on.