This is a digital audio Receiver that is Not working, it is an 5. 1 channel model, it is tested works.
The Sony str-k750 p digital control center fm am stereo Receiver is Not Working properly, you can try to start the program from scratch. If your Sony 5, 1 channel 150 watt Receiver is Not Working properly you can try to power it down by pressing the power button, if that does Not help please see if that is the only way for the you can also check the power cord and plug it in new if that is the case. If that is the case, please see if that is the only substitute for the if the Receiver Not Working or Not Working correctly, it is due to the subwoofer which is Not working, to solve the issue, you can try to clear the subwoofer memory to see if that is the issue. If it is Not the subwoofer, then you may need to replace the subwoofer, if the subwoofer is new, than it may or may Not be necessary to replace the subwoofer. If you are using a replenishing series receiver, then the subwoofer may be less than 30 days for a full replacement, if you have a Sony receiver, the subwoofer Working may be because there is a Sony 5 speakers. These are typically used in the top noise level setting, if these 5 speakers are Not Working and the Receiver is set to the top level options, please try to set the Receiver back to the lower level options. We also recommend trying different speaker systems and speaker if all else fails, you may need to replace the speaker.