Lenovo Speaker M0620 Lenovo Speaker M0620 - Page 4

Troubleshooting If you meet any of the following problems when using the machine, you may solve them by following the troubleshooting tips below. If a problem remains unsolved after following these tips, please contact local dealer or Lenovo's service support according to the contact information in the warranty certificate and you must not attempt to repair the machine yourself to avoid electric shock accidents or aggravating the malfunction. Problem No sound produced Possible Causes • USB power source is not properly plugged. • The speaker is not properly connected. • Input/output cords are not properly connected. • Input mode is wrongly chosen. • The speaker's terminal is short-circuited. • USB power is insufficient. One side of • The speaker is not properly the speaker connected. is soundless. Buzz or • Input is not grounded or not low- properly connected. frequency noise Solutions • Plug the USB power source correctly. • Check the connection of the speaker. • Connect input/output cords correctly. • Choose the right input mode. • Connect the speaker before turning on the computer again. • With some computers, the speaker connected with one USB interface occasionally doesn't produce sound. This is generally due to insufficient power supply from the USB terminal. The problem may be solved by plugging into another USB interface. • Check the connection of the speaker. • Reconnect or examine the signal cords. If the problem persists after it is confirmed that the connection and signal cords are normal, then the problem generally is caused by crosstalk between the audio signal and the USB terminal. Try reducing the noise by moderately decreasing the volume of the woofer. In addition, you are advised to keep the speaker more than 30cm away from your head to ensure that you can enjoy the optimal sound effects. 2 M0620 user manual.indb 2 2011-7-29 11:02:14