What to do when there is “error code” on screen?

There are solutions when you have these error codes. Error codes(800, 402, 405, 411, 501)

When TV screen show: 800, it’s the problem with Network connection. please try reboot router and connect network again.
When TV screen show: 402, it’s the problem with IP blocked. (illegal used) connect vpn to make it work.
When TV screen show: 405, it can’t be used in Australia and New Zealand. (Contact us or use VPN)
When TV screen show: 411, Data exception, the server disabled the device, you need to contact us for help.
When TV screen show: 501, It means server upgrade, user needs to wait for upgrade done.