Creative Labs GigaWorks T40 Series II – loudspeakers (Tabletop/bookshelf, PC, Built-in, Wired, RCA/3.5mm, 50-20000 Hz)

Refer the user manual below for troubleshooting
BasXPort technology enhances the low frequency response without the bulkiness of a subwoofer. Convenient front access to volume, bass, treble and input jacks.
Connects to your computer, MP3 player, LCD TV or other stereo audio sources.
Comes with a power-saving feature that puts the speaker on standby when audio is not detected, and wakes it up automatically when audio is played.
This item is non-returnable. Please refer the User Manual before use,