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To help you reset default settings of Dell monitor, please find the instructions step-by-step given below:
- Press the 'Menu' button on the monitor panel.
- Press 'Plus(+) or Minus(-)' button to move to 'Menu Settings'.
- Again press the 'Menu' button.
- Press 'Plus(+) or Minus(-)' button to move to 'Factory Reset'.
- Again press the 'Menu' button 'Twice to Reset'.
- Press 'Plus(+) or Minus(-)' button to move to 'Exit Menu'.
Try the automatic-configuration on the monitor by using the software buttons on the bottom. You should be able to adjust the colours from there. There is no 'right' colour, but you can set it back to defaults on the menu.
Push the "Menu" button on the front or side of your Dell
monitor. The button's icon resembles a miniature monitor. This will open
the main monitor setting menu. Push the button again to exit the main
menu and open the OSD menu.
Push the "Down Arrow" button on the monitor to scroll
through the OSD menu. Stop at "Factory Reset." Push the "Menu" button to
open the factory reset menu.
Push the "Down Arrow" button to select "Position Settings
Only" to reset the monitor's horizontal and vertical screen settings.
Press the "Menu" button to activate the setting changes.
Push the "Down Arrow" button to select "Color Settings Only"
to reset the monitor's red, blue and green color settings. Press the
"Menu" button to activate the setting changes.
Push the "Down Arrow" button to select "All Settings" to
restore the monitor to its original factory settings. Press the "Menu"
button to activate the setting changes.
Push the "Up Arrow" button to select "Exit" to leave the
monitor reset menu. Press the "Menu" button to exit the OSD menu. Push
the "Menu" button again to exit the main settings menu.
Reset factory settings. Push the selection button (second button from the left at the bottom of the monitor, next to the AUTO button), then go the the Factory Reset by pressing the minus button. Press the selection button again, and when it asks if you want to reset say YES by using the minus button. It's a quick fix!
You didn't say which OS you're using but it sounds like you've changed the aspect ratio of your video signal. Different screen resolutions have somewhat different aspect ratios. The aspect ratio indicates the ratio of the number of pixels of width to those of height. For example: my video driver offers a resolution of 1280 x 960 or 1280 x 720 which would give screen aspect ratios of 1280/960 = 1.33 :1 and 1280/720 = 1.77 : 1. The latter would produce a narrower image. You can compensate somewhat by increasing your horizontal sweep voltage with your monitor menu. A better solution would be to select a resolution that more closely matches your monitor's screen size.