I have problem in my lg lcd monitor when start computer windows loading then il say out of range 53.5Hz/85Hz. i don't know how to solve that problem.

In the monitor go to menu-settings and restore it to factory settings

Sounds like the resolution is set to high which is why that message would come up. When you turn on your computer, keep pressing the F8 button. It will bring you to a menu. Choose "Safe Mode" and press enter. When you get into windows go into the display settings in the control panel. Then go ahead and set the resolution to 640X480. After you do that go ahead and restart the computer and let it boot up normally. That message should go away and once you get back into windows you'll have icons that look bigger then normal. At that point change the resolution to 800X600, if it takes that then try 1024X768 if you want to.

If after you are in safe mode and change the resolution and that error message comes up then you'll need to download the video drivers for your computer and reinstall them.