I have an iMac 2.66 GHz Intel Core 2 Duo with 4 GB ram, 800 MHz running
10.6.3. Everything has been running perfectly until a couple of incidents in
the last week or so.

I have had an instant screen failure, both times when trying to move files
with the mouse. Half way through dragging the files from one folder to
another the screen blacks out. I can still hear that the computer is on, but
there is no way of "waking up" the screen.

The only way out seems to be holding down the power button until the
computer switches off, then restarting. On restart everything is fine again.

Has anyone else experienced this? Does anyone know if this is a software or
hardware problem?

When everything starts up fine again, it has been more of an inconvenience
than anything else, but I do wonder if it is actually going to start up
again next time!

David

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