No power when monitor attches

I use a donated MAC G4. All was well until I disconnected my drive to move it. Now, with all connections correct, I can not turn it on. When I disconnect all but the power cord, the unit turns on. But as soon as a monitor is connected, the power goes off. With the monitor connected it will not turn on at all: no lights, no fans, nothing.
Help please.

Hey City,
I use a donated MAC G4. All was well until I disconnected my drive to move it. Now, with all connections correct, I can not turn it on. When I disconnect all but the power cord, the unit turns on. But as soon as a monitor is connected, the power goes off. With the monitor connected it will not turn on at all: no lights, no fans, nothing.
Is this a monitor with a VGA, ADC or DVI connector? Try a different monitor.
Richard

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    Help please.

    I use a donated MAC G4. All was well until I disconnected my drive to move it. Now, with all connections correct, I can not turn it on. When I disconnect all but the power cord, the unit turns on. But as soon as a monitor is connected, the power goes off. With the monitor connected it will not turn on at all: no lights, no fans, nothing.
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