@MarjaE:
Didn't know you don't have the device anymore. My questions were asked to see if it could be revitalized. So this is all theoretical.
Quote:
4. Huh? Why would I hold the refresh button?
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That is having the same effect as adb reboot-bootloader, allowing to flash it with the right tools.
From what you told so far it a lot of things could have happened to your device, from internal failure up to a cracked screen .... Sorry, can't say more.
Generally though, from the reports in several forums I can make an educated guess that those devices are quite reliable.