STA-300 (310-1991) Troubleshooting Faxback Doc. # 8125 If the receiver is not working as it should, the following suggestions might help you solve the problem. If you follow the suggestions in this chart and the receiver still does not work properly, contact you Radio Shack store where our personnel will assist you. Problem Cause/Remedy No power. (The display is off.) Press POWER. Be sure the power is plugged in. Try a different AC outlet. No Sound. Check the sound source connections. Be sure you have selected the correct sound source. Check the speaker connections. If the headphones are plugged into PHONES jack, speakers do not work. Unplug the headphones if you want to listen through speakers. (ALL-01/12/96)