Just purchased and installed a new ViewSonic 22" VA2231wm widescreen monitor to go with an existing Dell OptiPlex GX620 desktop computer. While attempting to get better resolution, got 'Out of Range' message and had to unplug new monitor and go back to old CRT monitor. How can we make this combo work? Thanks for your help!

You should call Dell for this purpose. They usually can mail you a recovery disc for free.

If your computer has a video card try connecting the monitor to the motherboard video.

Check to see if the disc is clean, wipe it over with very soft cloth.

Try again.

You will need to visit the Dell website and download the Windows 7 drivers for your computer. Click their downloads/support button.

Take care!
damnor01

Go into the BIOS and hold down the key and then press the and keys in succession. This should force the motherbrd to go out and detect all connected devices.

If you pull the side access cover off the computer tower, look inside and you will see a large circuit board, that is the Motherboard, on that board you will see a button sized silver battery, this is the battery backup for the "CMOS", and keeps the time and other memory functions alive. Carefully pry out the old battery and replace it with a new one, any Radio Shack or electroinics supply will have the battery. The battery number is on the battery. Make sure to install the battery exactly as it came out, it has a positive and negative side, write it down.

You can download the manuals for your OptiPlex GX620 PC directly from the Dell website here:
http://support.dell.com/support/edocs/systems/opgx620/en/index.htm

check your device manager, if theres a problem get rid of drivers ,install origionals. also check that your computer is output analog ,not just spdif.

Install your Windows again.....

You also have to install the monitor drivers.
And yes, the drivers directly from Intel will not work. Dell has a perpritory video, and you have to use the Dell Intel drivers.

I've installed a few of these, and I know they will work.
But I had to go with a 1280x1040 setting. It does work, and will fill the entire screen.

Another option is to put in a PCI video card (yes, a full size card will fit in the GX260's) One bonus to that is you can do multiple monitors. I've had best luck in the GX260's using video cards with an ATI chipset.