No Volume. Mute is not on. Volume control is at normal level. Tried leaving the TV off for awhile but still no sound.
If there is no volume in your TV, and mute fuction si in off position, and the picture is ok. there are two possibilities. The first one is, speaker of your TV is damaged. The second one is audio output Ic in your TVs inner circut board failed.
You just open your TV taking after every prcautions when we take before working with an electrical equipment. Keep children away from you, and let an adult beside you. Plug out your TVs mains chord out of wall socket, and never use a matal chair or a chair fabricated with metal. Do wear a rubber or plastic shoes, and not try to work with bare foot.
At first be sure whether the speaker is out or not. It can be tested without opening your TV. I suggests these, keeping in mind that your TVs picture is Ok. If not the problem may differ. Keep your ear very near to the speaker side of your TV, and swith it on with mains supply, and listen there is any sound or just a "thumb" sound is heard from the speaker. If there is no "thumb" sound, surely the speaker is damaged. Replacing it with same type and impedence [ie 4 ohms, 8ohms, 16ohms etc, will be marked on its magnet], will solve your problem.
If there is no sign or any sound, or just a "Hum' sound is prodced, the audio output Ic of your TV is damaged, or it is not getting the proper supply voltage to the respective supply pin. If there is a "Hum' sound produced from speaker, it is clear that your TVs audio Ic gets voltage, but it has damaged.
To repace it, you just follow, the two wires to your TVs speaker. It will go to the main board of a sub board which audio Ic is fitted. Normally this Ic will be screwed into a metal heatsink to runout the heat generated from it while working. Just desoder it, unscrew and take it out. Go for the same type and number. "Insist on same type and number. never try to use any substitutions, as it may effect the quality of sound". Solder it to the point. That is all.
Wish you success
If you have any further doubts, report to Fixya. They will send me alerts. Ok
Oct 21, 2010 |
Zenith C27A24T 27" TV