Eclipse screen flicker

Hello all

Has anyone experienced screen flickers a little on the eclipse?

I used to have some ticking with volume control on the eclipse and changed speaker cables to PL to PL with adapters

Now the ticking sound is gone but when I use the remote there is a small flicker on the screen mainly at the top.

Could this be a bad HDMI lead or Ethernet cable between the TV and the speaker?

Any thoughts or advice?