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Fuses blow when there's an overload. This is often caused by a short-circuited transistor or IC. Fuse blowing is more common in Amplifiers rather than a Tuner, where it is the power transistors that have failed. If it is a Tuner that's blowing the fuse then look to the power supply section for the faulty device.
Some of the new systems have a separate headphone amplifier chip. In that case when your wires came off , they must have shorted a second damaging the output amplifier. The protection circuit turns on disabling both the channels . On Sony systems a warning display comes on and the stereo goes to standby mode till the fault is fixed .
This is error code which system control detected either power irrgularities or dc voltage is detected from the speaker out put line.This fault we have noticed that both of them appears same time also.Pls change Amplifier ic TDA8920 and C1740 transistor and 27V1w zener diode.Transistor and zener diode is for voltage regulation and amp ic if the dc detect is active.Usualy change this three components same time.(this all is in power amp section)