I have a HP2509P Monitor that decided on its own to go into perpetual sleep mode.
The display will not stay on any longer then 2 seconds. Thus, I have no way of getting this monitor to be usable. It's a friggin anchor on my desk and about to see the mouse go through the front of it. And, no rational explanation as to why it just decided to do this, when it was working completely fine before. And I hadn't adjusted anything. I've attempted to connect the HDMI cable to another laptop and I experience the same issue.
I keep finding bits and pieces of partial advice from those who have had similar occurences, however, nothing gives me help/assistance in what to do with a blue power light ON and sometimes the rest of the function/display lights coming on if I push the power button long enough or unplug and then replug the power in.
I DO NOT HAVE ENOUGH HAIR TO PULL OUT OF MY HEAD to resolve this.