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First--was it working? Did it suddenly stop? When you see the LG logo, then it goes away, does the power light turn from green to amber? Sounds like that doesn't happen. So--if you are getting a signal, you should see something. If there is no signal, then the power light should change from green to orange. With no lights at all, I suspect a faulty monitor.
If this has happened to two monitors on the same computer, then i dont think the problem is with monitors, i think the problem is with the graphics on the computer, i suggest uninstalling the driver for the graphics card in device manager and then restart the pc to see if that makes any difference. The divice manager in in the properties of my computer icon, just right click and choose properties, then device manager.
Your monitor is going into power saving mode. When it receives no video signal from the computer, it will stay powered for a few seconds before giving up and presuming the PC is off hence why it stays green for a while, then goes orange.
ok here could be 2 problem
1 your computer done send video signal
2 cable it is bad
you should try first to other computer to see if work , if yes that means your computer it is with problem , if not work that mean your monitors dont receive signals
The problem is in the "soft switch" technology:
On some of Sylvania's newer monitors they have incorporated what is called "soft switch" technology. This allows your ATX power supplied computer to turn your monitor on and off using it?s software controls. Therefore, your monitor?s light will always stay on blinking even when your computer is off.
The monitor in normal operation consumes about 80W of power; in the "OFF" state it will be reduced below 8W. The "OFF" mode of the monitor can be controlled by the PC input signal or by pushing the soft-power button to disable the PC signal control for manually turning off the monitor screen.
Thus, when the monitor is in soft-power "OFF" mode it still consumes a very small amount of power. For the purpose of making it noticeable to the user that the monitor is in soft-power "OFF" mode, we designed the power indicator to provide for a slow blinking signal (every 2 seconds). If you need to totally turn off the power, then the power cord would have to be unplugged. The same is true of the PC itself, but the PC does not provide for notification while in "OFF" mode.
Your monitor looks like it may be in need of repair, contact info:
PTI Technologies Inc.
7372 Doig Dr.
Garden Grove, Ca 92841
Hours: Mon - Fri 8:00am to 6:00pm PST