I TURN IT ON AND IT SAYS CHECK SPEAKER THEN SHUTS OFF (2)

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

In my case the speaker only played the higher frequencies but not the low mid range to base. Most likely your speaker is "blown". Outdoor use is hard on electrical components. The fix is easy. The free space 51 speaker is identical in size to the standard Bose 901 4 1/2" speaker. You can buy a Bose or a good quality knock off (either way they will need to be broken in before yielding the best sound). It is not clear to me whether the original Bose uses a special moisture resistant cone. I treated my replacement with a light coating of silicone spray (for upholstery) carefully protecting the foam surround and cap at the center.

Just unscrew the three screws holding in the plastic grill in front of the speaker (using a nut driver or socket wrench). The speaker will drop out. Be careful with the foam wrap around the wire as it tends to be fragile and greasy. Solder in the new speaker making sure you get the polarity right (although for outside use this is probably irrelevant). I would test the speaker in place before soldering just to make sure. Reassemble and break in the speaker. Again I don\'t know know well the replacement will weather the elements. Keep your finger crossed.

Sounds simple... usually "protection" means that a speaker or a speaker wire is shorted out. Or that the volume is just too damned high... how loud is the receiver's volume setting? If the bass tone control is jacked and the loudness button is on, even with no shorted wires, the amp can go into protection from an internal overdrive. Might be that you just need to do like your mom says and turn it down!
If you have an ohmmeter, speaker or wiring problems are easy to test, if you don't, you can still do it all mechanically... here's how
Turn off the receiver and start by disconnecting your speaker wires at the back of the receiver. With all of the speaker wires removed, does the thing still go into protection when you turn it back on?
If not, good. If it does, find a service center.
Re-connect the speakers to the appropriate terminals one speaker at a time, turning off the receiver each time you make a connection. After connecting one speaker, turn the receiver on and see if it shuts down. If not, then turn it off and add one more speaker.
Do this until you find the culprit. Leave that suspected bad speaker's wires disconnected from the receiver and test all the rest, connecting all but the bad wires.
Now, disconnect the speaker from the other end of the bad wires and spread the bare wires apart so they don't short out. Connect the wires ONLY at the amplifier end and turn the amp back on. Protection?
If yes, the wire is shorted out somewhere. got cats?? If everything is OK, turn off the receiver and reconnect the speaker and test again. Make sure the wires aren't shorted at the back of the speaker. You really need to check all the speakers to make sure their connections are "clean" and make sure that there are no stray wire strands anywhere or that the wires aren't stripped too much so they might be able to short out. After the wires are connected to either a speaker or an amplifier, you shouldn't be able top see much of any bare wire, but you already know that, right?
Some folks strip way too much off the wire and the wires simply touch the wrong things and ... badness happens.
If all the connections are clean and the receiver still shuts down when this speaker is connected and the receiver is turned on, swap a working speaker onto these wires, leaving the suspect speaker disconnected and making sure the other bare wires won't touch anything or each other.
Back on with the working speaker... good? If so, then we're determining that the problem is probably in that one speaker. If not, then we have a deeper problem.
Reconnect the suspect speaker to the other wires and try again. Good? Then you have "fixed" the problem by cleaning up the wiring connections. If it shuts down again, then you need to fix or replace the bad speaker.
If everything works now with the volume down and such, then just use a little self control. If it's still messed up, you may need a trip to the service shop
Good Luck

Disconnect all speaker wires at the receiver and turn the unit back on. If it stays on, your receiver is ok and you need to reconnect speakers one by one and test until you find the one causing the "protection" once you find this, disconnect the wire at the speaker and test again. make sure the + and - wires do not touch! If the receiver stays on, use a multimeter to test the speaker for a short with resistance check. If your not sure how to do this, any home audio shop will test it for free and while you wait. If speaker wires are disconnected and it still shuts down, it needs to be serviced. Hope this helps

It's in protection. Disconnect all your speaker wires at the receiver then power it up. If it stays on, the receiver is ok and you need to check all wires and speakers for shorts. The easiest way is to reconnect one speaker at a time and test power until it shuts down, then disconnect the speaker wire at the speaker and test again. If it stays on, meter the speaker for shorts or bad voice coil. if it still shuts off, check your wire or replace. If the receiver's power still flashes with all speakers disconnected, it needs service or replaced. Before reconnecting your receiver after repair or replacement, check all wires and speakers 90% of the time, that's the cause. Hope this helps. If you still need help, post a comment and I can help you troubleshoot further.

First, disconnect all your speakers from the back of the unit. Then turn it back on, if it does not go into protection, turn it off and examine your speaker wires, look for frays that could touch the other binding post (most common problem). Then re connect speakers one by one; testing after each connection. If you get them all re connected and it still plays, you've solved the problem. If you get to a particular speaker and it cuts off, check the wire, then check the speaker. If theres nothing plainly visible, swap the speaker for one that is working and try again. If it still shorts, try a new wire. Beyond that, if it's still shorting, theres a problem internally with the receiver and it need to go to service. If you have all speakers disconnected and it still goes into protection, there is nothing you can do but get it serviced. There are no internal protection "fuses" Hope this helps

Check your speaker wires on zone 2 and look inthe manual for speaker configurations with zone 2. you may have a speaker conflict. If you still have an issue, post a comment with your speaker setup and I'll help some more. Hope this helps

Have you disconnected all of the speakers and tried? Sounds like there is a short and the amp is going into protect mode.

Hey guys, just had the same problem and found out it was because I had disconnected the central speaker. This it was creating a back impedance or something and reonnecting did the trick! i.e. check your speaker connections and check that they work... duff speakers could cause the problem too!

Disconnect all your speakers from the receiver. Turn the power on, and see if it stays on. If the unit shuts off with all the speakers disconnected, then you most likely have a faulty unit, and it will need to be repaired or replaced.

If the unit stays on with all the speakers disconnected, then you most likely have a bad speaker or a bad connection with the speaker wire.

Starting with one speaker, hook it up, and turn the unit on, and again see if the unit stays on, or if it shuts off. Do this until the unit shuts off when you connect a speaker.

Then disconnect all the other speakers, and leave the suspect speaker attached. Again, try to power up the unit. If it fails with that speaker attached, but works when it is not attached, then that speaker is your problem.