Pavilion 23xi monitor - problem with screen going blank

Hello there, Recently, the screen on my 23xi monitor started to go blank after some usage (the time varies).  When this happens, the power light on the right corner of the monitor remains lit, however the power button doesn't do anything when pressed.  I don't think it's my computer putting it to sleep, since I've already checked my power settings for that, as well as the ones on the monitor's OSD.  The only way I can get a video image back is by unplugging and replugging the power connector located on the back.  I've had the monitor for only a year and a half.  Any ideas? Thanks!

Is there any fix for this please as the exact same thing is happening to me. I've had the monitor 1 and a half years, and for the last week, on either VGA/HDMI/DVI, and connected to either my PC or games consoles the screen will effectively freeze after a given period of time (always after around 20 mins or 30 mins of use). The power light stays lit and can't be switched off, the only way is to unplug from the wall, which is very annoying. According to HP website the 1 year warantee expired in June 2014 so I am not sure what I can do to get this resolved, but a monitor should last more the a year and half, all my other monitors are 3-4 years old and still working.

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