Gpu hdmi stopped working, burn smell

I would suggest that you clean your computer because that picture i can see dust everywhere ontop off the gpu and on the cables and also take out the gpu and inspect it for any burn marks and check the gpu cables!
 


Dirty and dusty can effect your computer so sounds off it your gpu burned out have you got warranty on this! because most likely you need to send it off or buy an new one. But you really need to clean your computer out!