monitor problems or g4 problems..clicking?

[Joe Kapsner]

Hello.  Here is the story.  We have a g4 400 mhz mac which was hooked 
up to a monitor that went dead.  Every now and then you would here a 
clicking noise that snapped at you as the light flickered on the crt 
monitor.  As the clicking went on it got more violent and then 
eventually the monitor's picture just went dead, a nice ol black screen 
of death was all we could see.  We then purchased another crt monitor, 
hooked it up and voila! the picture was back...everything seemed fine 
until the clicking attacked us again.  I thought maybe the monitor was 
the problem but it is obviously not since the new monitor is doing the 
same thing.  I'm afraid something is dreadfully wrong with the insides 
of the G4...but what could it be?  What should I do and check?  Is it 
maybe the connection?  Video card? battery?  I have not a clue.  Any 
suggestions?  THanks in advance.

Joe