No signal the external input not working

[Amelia1231]

When I turn my tv on it comes up with a triangle with a (!) inside and says "no signal. Check external input or select another input using the input button" I have tried changing the cable to another hdmi or n unplugging and re plugging things back In but the sky box is still got a red and yellow light in boyh buttons 

[Addie15]

Hi there, Amelia1231. I’ve escalated your post to our Community Messaging team who will invite you to a private chat shortly and help you with this. 

Just look out for the colourful bubble to start the conversation.

Here's more information on how Community Messaging works - https://helpforum.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147 

[Mr+Flibbles+86]

We are still looking to help you. If you need our support let us know and we can re-escalate to our chat team. Your invite has been closed now. Thanks