I purchased a 1030 in April of this year. And several times, this happens:
I'm on a ride, and I pause for a breather/rest. I pause the ride pressing the lower-right button, and then I press the power button to put it in sleep mode.
After a few minutes, I press power again to resume the ride, and it never powers back on. I try pressing the power many times, try holding it for a few seconds, and it remains off and unresposive.
This has happened when the battery was at about 40%, yesterday it happened when it was 55%.
Then I feel like my device is either dead or the battery is a lemon and needs to be replaced.
But I just read on here, that this is called a device lock up and that holding the power button for 10 or 15 seconds will unlock it. And when I tried that, it worked and turned on again finally. I had it plugged in at the time too, thinking that charging it would wake it up. But charging did not wake it up or show any info until I pressed the power button for a while.
Is this a known bug? This lock up? Is it a feature? Any other posts or FAQs about this? It's not in the Garmin manual.