Thanks for the reply's guys. I've cleaned up the entire set and took a few boards out and cleaned them and check for any bad solder joints but they all looked fine. I've got a bigger problem now though, when I power it on, the noise remains but now the tv won't come on and it shuts off after a few seconds and the standby light flash in successions of 2, then when I power it on again the blue power light blinks 8 times in a row. I've checked all connections and they seem to be perfectly fine and in there place. Not sure what I've done

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