That sounds strange. I would expect the connection to be more robust.

Can you check what type of pins are used in the 976 and the your HDMI cables? If there's a material difference (e.g. 976 uses tin and HMDI uses gold) then you may actually be promoting bi-metallic corrosion.


You want the same type of metals on the pins. So if the 976 uses tin your HDMI cables should be tin. If the 976 uses gold your HDMI cables should be gold.