2311X Monitor Won't Power Up

My HP 2311X monitor will not stay powered up; It is not going to sleep (orange light), it is turning off.  I've listed my observations and what I've tried below.
- Blue power button  - When first plugged in, the power light on the monitor glows briefly, then slowly gets dimmer & dimmer until it is out. If I unplug, wait 30 seconds and repeat, it does the same thing.
-Green power light on rear of monitor next to power plug is lit & says lit.
-Green power light on the external power supply is lit & stays lit.
- I have tested the external power supply with a voltmeter and it is supplying the listed 12 volts (12.3 to be exact).  I have no way to test the supply under load.
- I have tried a different commercial power outlet (120 Volt AC) that is known to be working and eliminated the UPS from the picture.
- I have tried the "hard reset" by disconnecting power & video cables and holding the power button in for 60 seconds as suggested in other posts.
- The PC works fine with another monitor.
- Please don't say the R word (replace) - monitor is only 15 months old.  I refuse to see a nice piece of hardware fade away so quickly!
Thanks in advance for any help you can offer.

Hello phonedoc1,
If you don't want to replace the product or I assume take it to get repaired then you'll have to do the work yourself.
If you open the monitor up you'll notice it's powered by a circuit board that looks similar to one that is in a PC. You should check the board for any lose connections, bulging capacitors, and check the soldered connections to see they are still working. It appears that the monitor is getting enough power to the monitor, but once it reaches the monitor it's not "distributing" the power. It sounds like a soldered connection within the monitor has come loose.
This thread is similar to what you are experiencing. Maybe the information would be helpful to you.
http://goo.gl/kjkKw
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