slimport and hdmi connection issues

Hello

I have an Acer Iconia 10

I was using it on my LG 4k TV by using an acer slimport adaptor and hdmi cable with no issues at all.

Recently the connection started to become intermittent.

Therefore i replaced both the slimport and hdmi cable and the issue still persists.

Please can you advise how i can fix this?

Thanks

Donna