All receivers: signal, messages and error codes

Lost signal, no signal on some channels or flickering picture (all receivers)
Software update failed or stuck at 0% (OSN Plus HD, Show Box and Zapper)
Code E333: receiver starting power-saving mode
Code 8: free-to-air (FTA) channels not working or not activated
Code 9: channel currently unavailable
Code 4C or “Your OSN subscription has just expired”: service disconnected
Codes 4D and E999: subscription needs to be refreshed or validated
Code 4A: channel not available with your subscription
Code 1 or 2: Smart Card missing or not inserted correctly
Code 28: “Smart Card Loading”
Code 14: Smart Card not paired with the receiver
Error codes explained: what each code means and what to do
Channels change by themselves (OSN Plus HD, Show Box and Zapper)
“This programme is copy protected” message (all receivers)