One of the most common issues with a faulty HDMI cable are “sparkles” or flickering dots that are usually white. This might look like shooting stars or white noise, and may manifest as subtle “interference” or be much more distracting. An image that cuts out can also be caused by a dodgy HDMI cable.
How do I know if my HDMI cable is good?
You can determine if your existing cable is adequate in one of two ways. Check if the cable is labeled as High Speed, Premium High Speed, or Ultra High Speed. If your HDMI cable doesn’t clearly specify what type it is, you might be able to look it up if the manufacturer and part number are printed on the cord.
Can an HDMI cable go bad suddenly?
But you may need to replace them eventually The one caveat to all this is that while HDMI cables don’t simply go bad over time– they may need to be replaced one day. There are physical damage reasons that that might happen, such as extreme force shearing the cable in two, or damaging the internal wiring.