One day the monitor just would not power on - Xerox XA7-192i 19" LCD Monitor

Take it in to where you bought it and have them bench test it. Should be no cost to you.
Terry

Power saving modes are automatic for some LCD monitors some have setting like after 20 ,30 mins to an hour the computer monitor itself will go into standy saving modes like power led switch indication go to yellow led lighting or the monitor of the lcd screen go blank if ur computer have no pictures for displaying as a screen saver modes.Power saving modes it best for uses if ur computer it on all day long.If u don't touch the mouse or a keyboard the monitor will go in the power saving modes for less electricities consumption for less stress for the monitor electronic components for working to hard for the monitor not to malfuctions sooner or the monitor life cut too short because the computer it on all day.

I had the same problem, i took out the power cord and after 3 days i put it back. after that the monitor was working normal again

Check the caps in the power supply/inverter board.
http://s807.photobucket.com/albums/yy352/budm/LG%20L1751S/

Basic LCD monitor troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

good day, you may have a faulty monitor or a faulty videocard, have this checked. hope this helps, have a nice day

hi,
your lcd ip board (power board) capacitor had already exhusted.
got to replace the ip board

It is possible especially if it has a loose or slightly faulty component and moving the monitor has caused it to fail especially if you bump it in the move.
Does the power LED light up when you switch on the monitor?

I suspect the power supply for the monitor. Try a power supply from a working monitor. If you have a used computer store nearby, take your power supply to them and try it on another monitor.

There is no need to turn off a monitor using its power switch. Monitors automatically go into standby mode when they are not receiving a signal. In standby mode they use less than one cent of electricity per day. If saving electricity is your goal, raise the temperature in your home by a degree and run the air conditioning less.

Same problem started happening two days ago and ever since. I called LG and the product falls under a 3yr product warranty according to them (from my original purchase date of January 20, 2007). They will send packing slips to me so I can send the defective unit back to LG. I was told I am eligible for a replacement monitor - which will be shipped to me within 10 to 14 days (consecutive days, not business) - although I'm not sure what I'm being sent in return. My suspicion is that this monitor issue is a known issue by LG and they are quietly replacing the unit to those who follow through by calling CS.

Tips: Have your original purchase date on hand (in the form of a receipt) just in case they want proof of purchase.

check in back side of monitor reattch power cable after clean dust from it.
also check with other power cable that your monitor turn on with other cable.