Likely the tach within the fan unit has encountered an issue. This could be the fan unit or the wiring to the logic board. Basically, the resistive load of the circuit is not correct.
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I would start off replacing the fan unit as well as inspect the fan connection point on the upper case and then following the connection to the logic board connection
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I would start off replacing the fan unit as well as inspect the fan connection point on the upper case (under the logic board) and then following the connection to the logic board connection.
Likely the tach within the fan unit has encountered an issue. This could be the fan unit or the wiring to the logic board. Basically, the resistive load of the circuit is not correct.
I would start off replacing the fan unit as well as inspect the fan connection point on the upper case and then following the connection to the logic board connection
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