Some of the tv channels do not have a satellite signal

[JE22]

Need to know how to get satellite signal for all channels 

[PandJ2020]

If it's your own dish then it's probably out of alignment.

You'll either need to call Sky or pay a local engineer to check.

[Daniel0210]

@JE22 
If you’re seeing a “no satellite signal” message check that the connections from the Sky dish going into the back of your Sky Q box are still finger tight. Otherwise it’s very likely a dish misalignment so check the troubleshooting on this link
https://www.sky.com/help/articles/sky-tv-no-satellite-signal-sky-q
It may then give you the opportunity to arrange an engineer to check the alignment of your dish. If it doesn’t you’ll need to contact Sky to book an engineer appointment.

If you are connected to a communal dish you need to liaise directly with your building management company / landlord who will have their approved engineers to contact.

It’s worth noting that:

1 - a misalignment is not necessarily something that will be visible to the naked eye and could only affect one or two channels

2 - a Sky Q box requires a periodic 'Keep alive' signal that is delivered via the satellite so if that isn’t received the box will close down until the satellite signal is restored.

3 - due to the recent storms there’s still likely to be a significant delay in getting an appointment so it may be quicker to contact a local satellite company but that would be at your own expense.