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Maybe the frequency of the monitor is not supported, try changing monitor frequency from 75Hz to 60Hz, Screen Resolution > Advanced Settings > Monitor Tab > Screen Refresh Rate. If this doesn't work try installing new drivers, www.nec.com
you may try this came from manual.
Power Management" "countdown 20 sec
INPUT SIGNAL OUT OF RANGE
This OSD may appear to inform you that the signal being sent to the display is not within
its frequency range. In this case, you would need to check the resolution and refresh rate
you have your video card set to, and adjust to be within the range of the display
OSD Warning Messages
A warning message may appear on the screen indicating
that the monitor is out of sync range. Cannot
Display This Video Mode
This means that the monitor cannot synchronize
with the signal that it is receiving from the computer. Either the signal is
too high or too low for the monitor to use. See Specifications
for the Horizontal and Vertical frequency ranges addressable by this monitor.
Recommended mode is 1024x768 @ 60Hz.
Occasionally, no warning message appears, but the
screen is blank. This could also indicate that the monitor is not synchronizing
with the computer or the monitor is in a power save mode.
If you are getting this message this means that you are connecting a device to the monitor and/or a connection that is putting out a signal that is not supported but the monitor. You may also need to look at the cable you are using. Example I have an XBOX 360 with the official VGA cable when I use it to connect to my monitor it works fine. However I have been testing cables to get a setup for my PS3 as I have not been able find an Official one from Sony. So when I connect my RBG to VGA cable to the end of my RGB XBOX cable then to my monitor I get an Out of Range message. So something with the cable is case a problem with the signal to not to be sent properly.
Note with monitors they have a safety feature that they would turn off if they got a signal they did not properly support and/or not read properly. This has always been there they just not got where they would show you a message. Plus with monitors getting bigger they have stopped supporting lower resolutions so you may see this issue more often when hooking up older devices. I my self still have a 15 and 17 inch on my work bench for toubleshooting.
Hope this helps clarify things. Feel free to reply back with what device you are having trouble with.
restart your computer hit ALT F5 run safe mode setting graphics rasulation adjust monitor frequency only 60 Hz and again restart run normal mode then its OK. if are not OK again install windows this monitor.
That message appears when the Windoze display settings exceed the
monitor capabilities. If you will boot into windoze safe mode (F8 at
boot) and correct the display settings, the message should clear at the
next boot. Afterwards you can right click on the desktop and access the display settings to make final adjustments.
In your case, the refresh rate (V Frequency) should not exceed 70 Hz
It means that the PC is putting out a frequency that is not readable by the monitor. Basically comes down to the hertz that the computer is set to.
To fix this:
What you need to do is go into the boot menu by pressing and holding the F8 key just after the text of the boot process begins appearing on your screen until a list of options comes up on the screen. One of those will be to enable VGA mode. This will set Windows back to using the basic 800 x 600 resolution. Highlight that option (using the arrow keys) and then press Enter. Your screen should work just fine now.
From this point you can choose a resolution that fits into the range of the monitor. Be sure to "Test" the settings before applying them to be sure you don't run into the same problem again
change frequency setting to 60hz from the option of graphic setting using another monitor then agin connect your problematic monitor. step1.open properties on desktop using right mouse click. step 2.goto last tab (setting) step3.goto advance optinion step 4.goto third tab(monitor) and there is option of frequency change it to 60hz save it and press enter. now shutdown computer then connect your screen goes monitor check it.hope it works. when screen black its mean the range of signal frequency higher then compatible frequency.
It sounds like a heat problem in the monitor. It could also be a computer graphics problem. Leave either the computer or the monitor on for a while and then turn on the other device. try to discover which is needing to be warmed up. The buzzing and problems with the other RF devices around mean that the monitor or computer is emitting frequencies so it will affect the TV and maybe the computer. I found my computer emits these frequencies. I can't listen to AM radio when the computer is on.
first, 68.5 khz -85hz means horizontal raster frequency of source signal is at 68.5 kilohertz and repeats vertically at 85 hertz. (hertz means "cycles per second).
the sony monitor cannot "read" the signal being sent from the pc. change the screen resolution to a lower number like 75 or 70 hertz vertical.