Hi seethroughyou,
Cooldude and Peter are right, but there are a few other issues to consider:-
1) HDMI cables which GENUINELY meet the 1.3c standard are normally always good enough (beware of cheap imports which may have all sorts of random claims printed on them though!)
2) Good cabling practice is particularly important here, ie. run the cables away from sources of interference, keep them as short as possible and avoid any sharp twists in the cabling, or any undue vibration or movement once in place.
3) Some HDMI faults seem to defy logic, however, so improvements can sometimes be made to problematic setups by improving on the HDMI cables used. This is particularly relevant to long cable runs (ie. over 10 metres).
So, in summary, ignore brand names, look for the latest 1.3 compliance and buy from a trusted source.
Best regards,
Steve.
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