Monitor madness

[Shelley Huston]

I have a ViewSonic G810 monitor on my old AGP 450 G4 with MacOS 
10.2.6.  Lately and unpredictably, the monitor seems to shut itself 
off then come back on again - usually more than once.  The screen 
wiggles for a bit then steadies itself.  It seems to happen most 
frequently when first turned on or waking from sleep.  Sometimes it 
surprises me and does it really randomly.  Sometimes it will happen 
several times in a row.  I checked the plugs and the voltage and 
found no problems.  I haven't opened the computer because that is a 
chore - as much has to be moved.  Anyone know if this is a monitor 
problem or a card problem?  Suggestions?  Thanks for your help.

Shelley Huston, sihuston at myepath.com