No audio and staying in protect mode - Power Acoustik LT-980/2 Car Audio Amplifier

https://audiokarma.org/forums/index.php?threads/denon-dra-435r-protection-mode-factory-reset.932470/

https://www.google.com/search?q=denon+435r+protection+mode+reset

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Lots of help in the links

Amp goes into protection mode - Polk Audio Forum

https://forum.polkaudio.com > discussion > amp-goes-i...
Nov 26, 2018 - As the title says , my 4 channel amp goes into protection mode when I turn my volume up to about 18-20 , causing a loss of sound .
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Protection Light ' Polk Audio PA660.4 Support - HelpOwl.com

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  What To Do If The Pertection Light Stays On ' Polk Audio ...

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Car amplifier(Polk Audio PA660) question - Badcaps Forums

https://www.badcaps.net > forum > showthread
Dec 19, 2013 - The amp, is a Polk Audio PA660. It was entering in protection mode. I have found a pair of final transistors shorted at one of the ...

Amplifier Protection Mode Troubleshooting - Car Audio Help

http://www.caraudiohelp.com > newsletter > amp_prote...
One of the more confusing car stereo problems can be when an amplifier goes into protection mode. One minute it's working and the next minute it's not, ...

Sony model:str-km2 stays only on protect even i disconnector speaker cable

• Only a select few things can cause protect mode with the battery only connected.
• An installation issue. Check the Power, Ground and Remote wires. Make sure non are shorting from one terminal to the other.
• It is still overheated and has not had time to cool down from being in thermal protect mode.
• The amp itself is touching metal. You always want something non conductive between the amp and where it is mounted, this includes the screws being used to anchor the amp. They should never touch the metal in the car either.
• The final thing that can cause an amp to go into protect mode while only hooked to the battery is the amp itself is malfunctioning and or defective. You can try opening the amp and look for any black spots on the circuit board where an electrical component might have smoked up or blown and replace that part.

Regards, Tony

The protection function has been activated because it has sensed an output load problem, turn receiver off and remove the speaker wires, this will reset the protection circuit. Now! turn the device on and turn the volume right down, if the protection mode stays off it indicates a short in the speaker wire or one of the speakers, but! if the protection circuit comes on with "the speakers and wires dis-connected" it means there is a short in the audio outputs in the receiver itself, this can only be rectified by having the parts replaced.

is some speakers is defective, or not present (connected), check all cables

Has an internal issue, if you know how to use a ohm meter, check the resistance of the wire on the interior of the amp, also check the fuses, ground, and power wire clean up the ground wire where it is connected to the vehicle

Check your manual, sometimes you have to take it back in, depending on the protection. Sometimes you have to change up the fuse. Is there enough power going to the amp, or to much?

Disconnect all speakers at the receiver, if it stays on, post a comment and I can help you troubleshoot further. If it stays in "protect" it needs serviced. Hope this helps.

The most common reason an amplifier goes into or remains in protect mode is shorted output transistors. To eliminate other possible reasons for it to go into protect, read the following page.

Troubleshooting - Amp in Protect Mode