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Dead control board perhaps?
Typically you will hear the EM200 drive tracking as soon as you power up.
The only other instance I have heard is when someone connected it to a 12v battery that was on the way out.....and the battery was not supplying enough power to get the drives operational or make the interfaces power up.....but the power LED was on.
So you could try with a second fully charged power supply prior to anything else.
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