Hi, I have a Cisco SPA504G that needs to be re-provisioned. I see 3 lights on (see attachment):
Red Microphone Mute button
Green Headset button
Green Hands Free button
The display is dark, none of the other buttons work, I cannot get to the "Network" display. The phone is on POE and I have unplugged and plugged in the switch connection, still no change. How do I fix this? Is there another way to factory reset the phone? Thank you.