A couple of things to check:
1. Check if the TV is connected to the network and have an IP Address
- Press mute, left, right, up, down, ok to go to professional menu
- Navigate to Wireless and Networks -> Settings->View Network Settings
Confirm that you have a network connection there.
2. Check if the hotel network is equipment where the TV is connected to is setup to do IPTV broadcast.
- Press mute, left, right, up, down, ok to go to professional menu
- Navigate to Channel->Channel Settings->IGMP Version for Multicast Channels]
Make sure the network equipment is set to the same version, if not you need to set the TV to the same version.
3. Check if the IPTV Head-end is working.
- Contact the IPTV Head-end manufacturer for support