Technobeam Issue

I have a Techobeam that is having major issues - maybe?
When powered up the fan runs, the motor led is lit and the whole display is lit up as well but the
fixture fails to respond to any commands or menu stuff using the on fixture buttons. Any ideas what it could be?
I looked at the fuses inside and they seem to be fine -where or what else should I look at for starters?
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