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It works for me and my Samsung HT-TZ122 Follow the steps below:
1. turn on and wait for the "NO DISC" message 2. press <stop> button for 5 secs 3. blink light noted 4. press "<enter>", "<8><4><2><6><9>" then "<enter>" 5. shut down unit and restart
PROT means that the AMP is protecting itself from damage due to bad or incorrect wiring or damaged and or incorrect speakers. Check your wiring and speakers.
If you find no problem then, DISCONNECT YOUR SYSTEM FROM THE POWER, disconnect your speaker wires...all of them, then reconnect the power ONLY, turn on the system and see if it still says PROT. If it does then your amp is damaged.
i had the same problem a prot display then it would shut down. turns out i had the sub disconnected(noise complaint from the shaking at my apartment complex) but the speaker wires for the sub connected to the amp or central unit. when i disconnected the sub i left the wires on the floor behind the sub separating the pos. and neg. somehow the wires got moved around and the pos was touching the neg. as soon as i noticed and fixed this problem the system was working fine. my samsung hometheater model is HT-BD1250
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