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Blue box I have been given a flatscreen monitor which on installation has a blue box in the middle of the screen saying "Input signal out of range". How do i remove this?

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You need to set the screen resolution or refresh rate of your windows. I am assuming you have XP.

Start your computer in safe mode (press F8 persistently at boot up)
Select safe mode

  • In windows, right click on a blank area of the desktop.
Left click on properties
Left click on the settings tab
Move the screen resolution slider fully over to the left.
Apply, and OK.
Restart your PC normally now.
If you get into windows OK you can repeat the above procedure from the bullet point above, but this time move the slider to a screen resolution that suits you.

If this doesnt solve the problem it may be the refresh rate, if so, when you get to the line where you click on the settings tab, then click on advanced. Select Adapter or Monitor and reduce the refresh rate to 60 or 70 hz. Apply and restart.


If you are STILL struggling, put your old monitor back on, set the screen resolution to 640x480 and 60hz as per the above instruction in normal (not safe) mode. Then shut the PC down and re-attach your new monitor. The reset the screen resolution back up.

Good Luck


Posted on Nov 07, 2008


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