mobile

The volume down button isn't doing anything on my son's Nexus 9. This wouldn't be a big problem in itself, but when rebooting he is put into the HBOOT recovery. I can move through those menu options (fastboot/factory reset/etc) with the volume up button, but can't select any of the options. Maybe the power button has broken too, I don't know.

I see that the volume buttons on Nexus 9 are causing problems for people, but can't find anyone with this kind of trouble.

Does anyone have any advice on what to do next? Is there a way for him to reboot properly, without going into recovery? How can we get it to boot from recovery without those buttons doing anything? Should we just send it back?

Thanks for any help.
-tim