Got a strange one here,

Family member with a MB Twin+, Working fine for months, box is unplugged for something else to be hooked up for a day or so and then plugged back into the same HDMI port with the same HDMI cable but on boot up the openvix splash screen displays and then nothing. Black screen, tried different HDMI ports and different cables, tv etc but nothing will show.

If I use openwebif everything is working normally, I can grab a screenshot, change channel but still nothing on the tv.

Any ideas? Is it the tv?

Thanks