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try iptv reset

908 comedy central mx down for a week now
754 digital 15 sport dominican republic down for a week
909 tru tv MX down

the blackscreen happen often when portal freez up while loading options 1. reboot the box whit stb open ( unplug power cord wait 15 sec plug back)
...

you have to wait a few hours then try again if it dosnt work contact seller to reset it

reset mac and verify device id in setting mark mac authentication and send device id
iks66.tv/main/search

when that happen restart the box and start al over whit the password and user again it work for me 100%
make sure you dont have another device wuit the same mac and service connected. or it will...

That doesn't help I have freezing channels since 9 speed test 75MB reset mac doesn't help.
Spanish channels freezing the most the rest freeze enough to make you turn it off and catch pokemon.