Hi everyone! I have a really annoying humming problem with my new laptop/audio setup which is as follow; I basically have a laptop, connected to an eternal monitor through HDMI, from there i have an AUX splitter, which lead to a hifi, and iPhone dock, which play any sounds that the monitor receives from the laptop through HDMI. There is also a separate cable from my hifi, which i use to plug anything else into the hifi system. The humming noise is constant with this setup, and the only way to stop it is by either plugging the whole audio system directly to the laptop (avoiding the HDMI/Monitor) or by simply plugging something into the second hifi cable! I have tried removing the second hifi cable altogether, but there's no change! Any help would be hugely appreciated! Thankyou!