Monitor hibernation problem

When my monitor starts up or idles into hibernation mode, black screen and green power light blinking, it will not come out of it. It does this whether connected to a computer or not on powerup. The only setting on the computer that has been changed since this problem began is to disable the sleep mode. I also attempted to connect it to another working computer with the same type monitor as well with no change. On random occasion, it will turn on when the video cable is disconnected and reconnected, but lately this has become so infrequent as to be undependable. At other times, when left unconnected from any source, it will go into a standby mode where the screen flashes solid colors in series. Once it does this, it will turn on when connected to the monitor cable. It does not often or reliably go into this mode either. One last note: the computer it is primarily connected to works fine with several other monitors and this monitor has the same problem no matter what computer it is attatched to.