Originally Posted by
kannuki2
*Resolved* You will not believe what my senior tech and I found. The rear fusing fan was not "ON" when we did output check sp5804-100. So we swapped a good fan and was still not working. We replaced BICU and immediately the fan came right on. So when i shut the machine off for 1 day it worked the next day. The heat was trapped behind all the boards and it triggered the message. The only thing I do not understand is what triggers the message "set fusing unit correctly" when it is too hot. Is that a safety mechanism from the thermopile to prevent fire to the machine when the machine gets too hot?
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