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U are using a Antenna for free AIR tv correct?Yes?Get a better antenna like a digital antenna should solved this problems,now a day a digital tv and a digital signal pretty strong this day,regular antenna will have this problems,because it tune into a radio waves signal too.
First of all disconnect the power & unplug the video cable from the back of the CPU & Monitor. Power-on the monitor & wait 10 secs. If the Monitor is functioning correctly, a 'No Signal' message appears & sometimes keeps bouncing around like a screen saver motion. This means your monitor is OK, if no signal message is not showing then either backlight or inverter(power) input has gone KAPUT. Replacing either or both may not turn out to be a cost effective soln. However if the damage is only in the cable then simply replace it or use the HDMI port..........................Sodeep63
The monitor needs a signal ( source), i.e., DVD, TV, to show a picture. If your monitor shows no signal then either the source is not connected or not functioning. Check the connections from the monitor to the source. Also, check that the source is functioning properly and is receiving power.
If the power light turns yellow, there is no signal being received by the monitor from your computer's graphics card. The screen will shut off (go into idle mode), which is a low-power state, that saves energy. Check that the cable on the back of your computer is plugged into the right graphics card (many PCs come with more than one, these days). There may be one built into the computer's mainboard, and another one may be on a separate graphics card located somewhere else on the machine. Only one of these will work on startup. If one doesn't work, try the other.
your monitor is beleiving it is not receiving any signal from your pc. 1 make sure your cables are secure. 2 make sure your pc is on. 3 borrow a monitor from a freind to see if your pc is sending the signal out, if the borrowewed monitor is showing a picture, hook yours back up. 4 if still not picture your mpcb or video pcb in the monitor is bad.
This type of issues is caused by parts called capacitors that have failed and are keeping the power supply from starting up correctly. You can rebuild the power supply board by replacing the bad capacitors and this will bring the monitor back to full working order. Here is a link to information showing what parts need to be replaced with pictures and parts list.
My monitor does the same thing at times and sometimes shows "No Signal" and at other times the screen will maintain the images but the backgound color switches to mustard yellow. In each of these cases I have been able to solve the problem by unplugging the power cord from the electical outlet for about three seconds and plugging it back in. I have a KDS model 780 LCD.
Most monitors will say "Power save mode" when they can tell through residual voltage that the signal lead is plugged into a machine, but there's no picture being transmitted. The four states of a monitor are:
* Off entirely. * Switched on, plugged into a computer but no video signal being received - usually displays "analog power save mode" or "digital power save mode" for a few seconds, then blanks. Comes back to life the moment a video signal is received. This state is the default in full power saving mode. * Switched on, not plugged into a computer. Some monitors don't display anything, some go into power saving mode, some fly "CHECK SIGNAL CABLE" or a similar message around the screen. Picture is restored when the signal cable is plugged back into the computer * On fully, receiving an image, and displaying.
see there is power in monitor and check also that your monitor is getting signal from cpu just remove the data vga data cable from cpu and see is it showing any massage on screen like check signal or any other massage. and check your keybord also by pressing num lock key see the light is on and aoff when you pressing the num lock button . if nothing is happen that mean your monitor is not getting signal from cpu and it is not monitor problem .
There is probably a bad capacitor within the monitor that will not allow the picture to "hold" in the on configuration. This will need to be replaced. You can send it back to Phillips, or 17" monitors are pretty cheap these days. I would suggest a Samsung or BenQ. They both carry 3yr warranties.