I just did four recent transcons with no comp sat TV. Only pay channels were operational in EC and regular Y. You can enjoy a tranquil blue color on the "Service Unavailable" screen for five hours.
Query the on-board leader if he/she will write up a ticket to fix it and you'll get, "We must be in an area of turbulence, it should come back shortly" or, "We can try to re-boot" or, "We're just between ground towers."
To remove a DL 752 from service requires a lot more than AVOD not getting free TV.