2Power SourceThere are two types of power(110V/220V) for the MS-Series,you can find theinstruction of the power type on the rear panel.The power jack and power switcher are below the rear panel.Power on thedevice,the MIDIPLUS LOGO will be lighting on the front panel.There is fuse(250V/3A) in the power jack to protect the Monitor from overload or faultcondition.Precautions●Don’t open the Speaker’s rear panel that might cause a fire or electric shock.●Don’t operate long periods of time at a high level sound or a level which isuncomfortable that may cause permanent hearing loss.●Please use the original package if you need to transport the Monitor.This willbe better to protect them from damage.●Please choose the right type of power source according to the powerindication on the rear panel.The wrong power source will lead to theMonitor burn down.TroubleshootingIf you have troubles,check out these tips:The power indicator LED is off:●Check the power line plugging in or not.●Check the type of the power source matching or not.●Check the fuse is good or not.If the fuse is blown,please change it(250V/3A) with the same current rating and trigger characteristics asreplacement.(Remark:If the fuse blown again after a short while,please contactwith us or the dealer that you purchased from).No sound:●Check the audio source cable to make sure it plug into both the source outputand the monitor input.●Check the volume knob to find if you shut off the sound or not.