Any reason why a computer would work with a flat panel monitor but not a crt?

We ordered 15 new computers.  One would not work with the crt monitors we had in the classroopm.  It works fine with a flat panel monitor.  But with the CRT  I see the windows splash screen on start up then the monitors go black and no longer displays anything.  
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On the computer that won't show anything, start it up and keep pressing F8 until you get a safemode option, using the up and down key select VGA mode this should now display a picture.

The reason is TFT can sometimes use to higher resolution which is out of range for the CRT this only becomes into effect once windows has loaded.

Hope that helps.

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flashactionsAuthor Commented:
your the man!   couldnt have asked for a better answer.
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Displays / Monitors

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