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I've done that a few times...
I hold the power switch for 30 seconds, then release and count off another 40 seconds.
The light goes on when I slide the switch.
At 7 seconds, it flashes once and goes off.
At 39 seconds (9 seconds after releasing) it comes back on.
At 61 seconds (32 seconds after releasing) it goes back off.
Documentation says that holding switch forces a reboot.
The same image is displayed, only now there are horizontal lines on lower left (artifacts form partial/failed refresh)
I repeated the experiment 3 times, waiting several minutes after cycle to attempt again.
No Joy.
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