I have a new NVR and having an issue with power up. When the rear main switch is turned on the fans are working and front panel lights are illuminated. But when pressing the front top right red on/off button to boot up nothing happens other than fans and beeping sounds, no output to HDMI monitor. The indicator light below the red on/off button is still showing white. I have also tried using the remote control but no change. Am I doing something wrong or is it faulty. Thanks Peter