Having problems with your Computer Monitors ?

It will say no signal - Computer Monitors

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I just ran into this same problem. I built a new computer. The old computer was running an nvidia card at 1600x1200. The new machine has a Radion card. The OS recognizes the monitor properly, sets the resolution to 1600x1200 at which time this monitor turns off saying no signal. I plugged in another monitor which worked fine, set the resolution to a lower resolution, and then switched the monitor back to the LG. If I try to up the resolution to 1600x1200, the monitor goes back to no signal status. I don't have an explanation as to why the current video card can't use the same resolution as the previous monitor.
It would be helpful if you had some more detail to this. However if it's saying no signal, and you're sure that that either the VGA cord is securely connected at both ends, then you may want to check the back of your PC to see if there is another video card installed, and try using that one. I've seen this happen thousands of times.
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