gfm A07MP310 User Manual Download Page 4

3

TROUBLESHOOTING

SYMPTOM

POSSIBLE PROBLEM 

SOLUTION

No power 

LED lit 

(AC Operation)

Power isn’t turned on.

Push the power switch to “on” position.

AC adapter isn’t connected to a 

wall outlet and/or the Power supply 

connector is not plugged into the 

power supply jack on the back of the 

product.

Plug the Ac adapter into a wall outlet and plug the 

power supply connector into the power supply jack. 

Surge protector (if used) isn’t 

powered on.

If the AC adapter is plugged into a surge protector, 

make sure the surge protector is switched on.

Wall outlet is not functioning

Plug another device into a wall outlet (same outlet) 

to confirm the outlet is working.

No power LED lit

(Battery Operation)

No batteries installed.

Install (4) AA batteries into the battery 

compartments. Make sure the batteries are installed 

per the illustration in the battery compartments. 

Power LED Turns amber  Low batteries.

Replace batteries.

No sound 

From speakers

Power isn’t turned on.

Verify the AC adapter is plugged into a wall outlet 

and the power supply jack.
Verify batteries are installed if the AC adapter isn’t 

being used.
Verify the power button has been pushed down to 

the “On” position and the LED is illuminated.

3.5mm stereo cable isn’t connected 

to audio source.

3.5mm stereo cable is connected to 

wrong output on audio source.

Connect 3.5mm stereo cable to the audio source. 

Make sure the signal cables are inserted firmly into 

the correct jacks.
Make sure the 3.5mm stereo cable is connected 

and fully inserted in the “line-out,” “audio-out,” or the 

headphone jack on your sound card or other audio 

source.

Problem with audio source

Test the speakers on another audio source by 

removing the 3.5mm stereo cable from the audio 

source and connecting it to the “line-out,” “audio-

out” or the headphone jack of a different audio 

source (e.g. portable CD, cassette player or FM 

radio).

Bad connection. 

Check connection of the 3.5mm stereo cable. Make 

sure it is connected to “line-out,”  “audio-out” or the 

headphone jack on your sound card or other audio 

source-and NOT “speaker-out”

A problem with your audio source

Unplug the 3.5mm stereo cable from the audio 

source. Then plug it into the headphone jack of an 

alternate source (e.g. walkman, Discman or FM 

radio)

Crackling sound 

from speakers (when 

connected to PC or 

laptop)

Sound source is distorted.

WAV and MID files are often of poor quality; 

therefore distortion and noise are easily noticed with 

high-powered speakers. Try a different audio source 

such as a music CD.

Sound is distorted

Volume level in operating system is 

set too high.

Check the operating system volume level and 

decrease if necessary.

Sound is Distorted

(when Connected to 

PC or laptop) Radio 

interference

Too close to a radio tower

Move your speakers to see if the interference goes 

away. You may be able to purchase a shielded 

cable at your local electronics store 

Noise when battery low 

power

Battery low

Change new battery. Please also make sure that 

speaker is switched off when not in use to save 

battery power.

This symbol on the product or in the instructions means that your electrical and 
electronic equipment should be disposed at the end of its life separately from your 
household waste. There are separate collection systems for recycling in the EU.
For more information, please contact the local authority or your retailer where you 
purchased the product.

DIST. BY
WHOLESALE MERCHANDISERS, INC.
2929 WALKER, NW GRAND RAPIDS, MI 49544
MADE IN CHINA

Reviews: