My boss’s monitor, same model Viewsonic, had the same thing happen a couple months ago. He called tech support, and they told they know what the problem is, but he’d have to send it back, at his own expense, to be fixed... and be without a monitor for 4-6 weeks. :-\
~ecurbh
Well... That kinda’ harshes my mellow.
But remember: The Dude abides. :-)