I can confirm success after charging then removing the SD card.

Combinations of removing battery, removing SIM card, & waiting were not effective; but after charging the phone on the wall charger until the LED was green then removing battery, SIM card, SD card, waiting 60 seconds, then putting all back in except the SD card, the phone then booted.

hanks to all here!

If data is being collected & in case it makes a difference, my SD card is 64G.

Where is Orientation Lock accessed? I had mine locked in Landscape, & now it seems locked in portrait. Shaking the phone vigorously has not changed it back.

Edit:
If I slide out the hardware keyboard, it rotates to landscape. Close the HWKbd, & it rotates back to portrait. It's sort of fun watching it whirl around.