Working phone still usable with broken (and black) screen
I dropped my Note 8 onto a concrete floor. It landed on the lower right corner and after a day or 2 the screen frazzed. No case (because I liked to carry it in my shirt pocket) -- it just slipped out of my hand (the case looks like it was designed to do that). Oddly, I could tell the phone was still working in all respects, but I couldn't see what the screen was trying to tell me.
I had Asurion insurance, so for a $199 deductible, I had a replacement phone in 2 days. But I had been a little lax in backup, so although the SD card was transferred OK, I had no idea what phone storage was backed up and what was not -- only Contacts appeared on the new phone. I had a lock screen configured, so couldn't even plug the phone into a PC to try to back up local storage. (And, it turns out, you can't back up phone storage to a PC.) Asurion's Tech Coach gave me lots of advice, but it all required actually using the phone to back things up or to use Smart Switch -- none of which I knew anything about.
I was ultimately saved by another feature I didn't know anything about. The Note 8 (and probably other contemporary devices) have a low-level process running which duplicates the screen content on a TV set connected via a USB-C to HTMI adapter. Samsung graciously provides the adapter for only $50, which can be bought much cheaper at the on-line store where everybody buys stuff; it was in my mailbox 2 days later.
I plugged my Samsung phone into the Samsung adapter, and then via the HDMI cable temporarily taken from my Samsung DVD player, to my Samsung TV set, and Viola! there was my (black) screen (enlarged to ~20" high). I pushed the power button, and my lock screen showed up. It took a while to learn how to touch the phone screen while being guided by what I saw on the TV, but the bottom line is -- I was able to use Smart Switch to transfer all my stuff to the new phone.
After the successful transfer, I reset the old phone to factory specs for security reasons, and after the power-off reset, the screen lit up just fine with the Verizon power-on screens, but then went dark when the reboot was finished. Go figure. But, at that point I just stuffed it into the mailer and sent it off to Asurion.