Posted 26 July 2009 - 07:44 PM
Lynn,
You are on the right track. I hope you only need to do a little tweaking to be fine. If not, you may need a new cable.
Right-click on the desktop of your computer in a blank space. In Windows XP, click on Properties; in Vista click Personalize. I'm on XP at the moment., so my instructions will reflect this, but they are almost identical on Vista.
Click the Settings tab. First, click on the monitor labeled "1" and decide if you want to COPY its screen to the other monitor or EXTEND the screen. I always extend it, as I want more real-estate, but both work. The check boxes are just above the OK/Apply/Cancel buttons.
Then click on Monitor 2 in the image, and adjust its screen resolution slider. It's helpful to keep the proportions identical to the actual monitor, so that squares are squares, not rectangles, and circles don't become ellipses. This should do it.
IF it does not allow you to make monitor 2 a high-enough-resolution, then there's a different problem. I discovered this when I hooked up a 24" widescreen monitor with an analog (RGB, blue polygon connector) cable I already owned.
Analog is fine, and necessary for most laptop output, but not all analog cables are alike! Some have more pins coming out and support higher resolution monitors. I purchased a newer cable, and all was well. Check the box your monitor came in, it may specify cable needs, VGA, SVGA or XGA for standard 4:3 monitors, and WXGA or other W... for wide screeens. And yes, the cable may be expensive.
Sigh... It's never easy.
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