Stream from PC to TV - I've no idea please help

[Alz_D]

Ok so my bluray player that used to support AmazonPrime now doesn't and my PC is upstairs. Without the use of cables how is the easiest way to stream my PC screen to my TV downstairs. I've seen chromecast but is that pretty limited? Ideally I would want something that would transmit video and sound? Does such a thing exist that doesn't cost the earth? Can an Amazon Fire TV box be beamed images from my PC?

Thank you for any replies

 

[Alz_D]

Thanks for the replies - my bluray player has DLNA and my dad has a fire stick so I can look at both those options.