Holding down "C" restarting from a Panther CD on G4 OS10.3.9, at restart our Dell 2007FPW monitor went black showing only an "Entering Power Save" dialog box which disappeared after a minute. We replaced the Dell with a CRT monitor which works fine. Tested the Dell on G5 Tiger-Dell works fine.
The same thing happened previously after upgrading Quicktime on the G4, then after another security and QT upgrade the Dell worked.
Suggestions please?

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