Power indecate foulty

Check speaker to power bank protection circuit. The circuit is faulty indicating to the power amp that speakers are disconnected that shuts down the amp to protect the unit

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- I'm not an expert but it almost sounds like maybe a speaker relay or whatever on the amp has bailed out.

Good Luck :)
R

You can't diagnose the amp with a PC. That's not what the RJ11 jack is for.

Have a read of your instruction manual (or download a copy from the Crown web site, and then read it). You'll see that the RJ11 is for fault monitoring. The feature allows a remote fault indicator circuit to be installed some distance away from the amps.

The fault indicator simply alerts an operator to a fault condition. The events that would trigger a fault are listed in the manual. The front panel indicators give a more comprehensive overview of the operating condition of the power amp.

Hope this helps

LAPTOPS USE A LOT OF ENERGY SO SOUNDS AS IF YOU NEED A NEW BATTERY BUT NEVER LET THE BATTERY DRAIN TO MORE THAN 20% BEFORE RECHARGING

that because you have a loose ground to your amp or not the right size wire but check your ground on the amp it will overheat and turn off to protect itself .

It's either a fault with the control panel or the overheat thermostat. Check the electronics for broken solder joints.

I'm assuming you mean he plugged an amp output (meant for a speaker) into the input of one of the Crown amps powering the sub-woofer. Right? Crown amps have good protection circuits and are high quality units. Some models have internal fuses but you didn't list a model here. If they are fused (or some kind of breaker) you should be able to see those by opening the top cover (amp off and unplugged). It is unclear if you tried to use the amp again after this incident.
Some Crown amps have protection circuits that will reset themselves after the fault is removed. In this case, you should remove both inputs and output (speaker) and power it up. If the amp doesn't light any protection lights or indicators, then turn it off and connect a known good speaker (not the subwoofer) and a source you can control. Set a low volume and see how it goes. You can really try either approach first depending on what's easier.

Nice amp. There is a breaker/switch on the back that trips to protect the amp. Turn it off, then back on and see if the green indicator comes back. If the breaker trips again, that's probably an indication of a more serious internal problem.

batter drains down. Turn engine of, let it cool, check water and oil. You should replace oil and automatic transmission fluid

you have a foulty amp i wtake it bk and change it