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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.
Here is the link for the E151FPb monitor manual. Since you email your question you have access to get this manual and print it. The manual shows the Auto set button, the contrast control button and a monitor reset feature.
Unfortunately you have to do each of these blind. Follow the instruction given, push buttons smartly, wait a few seconds for any action to take place, then follow the next instruction.
please try doing a factory reset of the monitor.
please press the menu button on the monitor itself. you can easily locate the buttons below or on the right hand side of the screen on the monitor panel.
select the factory reset /recall options with the help of the arrow/+ - buttons.
this would reset your monitor color settings to default.
This should be an (LCD) screen. They are the ones that usually have this kind of problem. You will need to take it to have it checked if the problem is the VGA signal cable leading to the monitor. They will check if it is properly connected or has gone bad. It is very unlikely that the screen is bad. When this VGA signal cable goes bad it could result in a totally blank screen.
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!