Mackie Active monitor - 1 speaker huge white noise

[Matt Darcy]

I recently got myself a new desk, and as a result had to remove everything from my old, get the new one in and re-wire.

I've got a pair of Mackie H264 MKII that I've put back on the desk and plugged power in. The left one is fine, the right one as soon as I power it on has a huge white noise sound coming from it. it has no input plugged in, and I've tried two IEC cables into two different wall power sources and through a Samson powerbrite power strip.

I'm in the UK so get good power, I'm guessing the right speaker is somehow damaged, it looks visually fine and I was careful moving it, but for one speaker to just make this noise with no input worries me. Suggestions ?

thans.