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Mackie 450 Problem


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Hi Guys

Has any one come across the issue of both the thermal and the peak red led's and the green signal led staying on as soon as you power up? No audio.


Used last week for a single mic in an exam hall.

Packed away, connected up today and found this problem.


Cheers for any comments or suggestions



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The only thing I can think of is a vibration-related issue. Pop the module out and check for detached or loose components, and then check the 2 fuses are ok. A fuse can blow and leave the capacitors charged up so take the usual precautions.
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