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That is actually two messages:
PRTCT (that is, 'Protect').
That means you need to turn Off the power ('Push Power'), and 'Protect' means protection against a short circuit has been turned On by the automated circuitry.
After turning it Off, you are to check whether the + and – speaker cords short-circuited?
And whether you are using only the specified speakers?.
And whether anything is blocking the ventilation holes of the system? (That could activate circuitry protection perhaps.)
Most likely speaker wires are crossed. But sometimes, also, the internal audio outputs could be internally shorted. That would require repair of the device, if so.
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