Poly vvx410-Reboot issue

I have an employee that has an issue that whenever someone transfers a call to her, the phone shuts down and reboots in the middle of the conversation. So I tried switching the phone, thinking it might be a hardware issue. I took the phone from our conference room and swapped it because we hardly ever use it.

I got the phone up and running on my employees desk, but when I went to plug hers into the conference room, it reboots and asks me for an admin password. I have no idea what this is and have never seen this before. Any ideas?