Not responsive in TE-Boot window

I just bought a used OP-1 and the seller did not do a great job so it arrived with some bumps, bruises, and broken keys. However, it works and every button triggers as it should. I want to update the firmware (currently 1.35), but when I boot into the TE-Boot screen, the unit becomes unresponsive to key presses so I can’t select one of the menu options to do anything on that screen, including update the firmware, factory reset it, etc.

Has anyone seen this before and, if so, can you provide any troubleshooting tips to resolve this issue before I return it to the seller? Thanks