When I turn on the system the power light on the sub woofer comes on then goes off. I have checked the connections and all plugs are in. one time the light stayed on but the bass did not play. All other speakers work when I click on the different surround sound options. what do you think?

SOURCE: SubWoofer

Sounds like your original and this sub have bad amps. The amp for the sub is not the same as the amp for the other speakers. The old unit has a dead amp and this new one is on the way out. (Pulling too much current on high bass)

SOURCE: WOOFER NOT WORKING JVC th-m606

I'm having the same problem. It seems that the mosfet's shorted blew up a capacitor and took some surface mount parts with it. It will be the middle board with the metal shroud (shield). The mosfets are almost impossible to find, I have replaced them (as well as other parts) but still have yet to find the problem. I'm now trying to find the subwoofer amp board (part#LVA10505).

SOURCE: Setting Up Surround Sound with satellite tv digital tuner

What model do you have?

You should be able to plug the audio/video output from the satellite TV system into the audio/video input on the JVC system. Then set the JVC system to the appropriate input.

I need to know the exact model to know how or if this is even possible. Some JVC models don't let you input any additional devices. Others might not have the inputs that are necessary for surround.

SOURCE: sub woofer shuts off

please check sub cable first with another good one and then change sub itself.because it draw too much power.

SOURCE: Subwoofer

often your sub need to be change because of its malefunction.