Problems in Speaker
These are three possible problems that your speaker of Samsung Galaxy S3 might have encountered:
For Noise in the speaker
The reason for this might be the dust on speaker diaphragm, and in order to resolve this issue, all you have to do is to:
If there is no sound at all while calling or receiving calls then all you have to do is to restart your phone.
For Low Sound
The only reason for this is that your speaker is faulty, and you need to change it in order to overcome this issue.
Hardware solution
In order to have a hardware solution of the speaker problem, all you have to do is to:
Problems
There are two main problems that are found in Primary and Secondary Mic of Samsung Galaxy S3
The potential solution is only for Mic goes mute while calling. If your Mic is only working when you record your voice, while it turns off/mute when you make a call then it is due to the noise filter cap, and it happens when it is damaged. Basically noise filter cap is a black colored rubber cap that covers the Mic hole for damage protection. If it is the case then all you have to do is to replace that cap!

If your Mic is only working when you record your voice, while it turns off/mute when you make a call then it is due to the noise filter cap, and it happens when it is damaged. Basically noise filter cap is a black colored rubber cap that covers the mic hole for damage protection. If it is the case then all you have to do is to replace that cap!
Hardware Solution

If no sound is accepted when you speak from the Mic, then all you have to do is to:

Your Samsung Galaxy S3 buzzer might have the following problems:
Problems
Noisy or Low Buzzer Sound
It must be due to the sticky dust over Diaphragm or protection shield over the buzzer, and in order to overcome that, all you have to do is to replace the buzzer part.
No Buzzer Sound
If there is no buzzer sound at all then all you have to do is to check the mute settings of Buzzer, and if it isn’t mute then:

Problems
If nothing happens when you insert your HD jack into your phone then:
These are three possible problems that your speaker of Samsung Galaxy S3 might have encountered:
- Noise in the speaker
- No Sound (While calling or receiving calls)
- Low Sound
- Dust on the speaker hole or speaker’s diaphragm might be causing this problem.
- Speaker might be damaged or faulty.
For Noise in the speaker
The reason for this might be the dust on speaker diaphragm, and in order to resolve this issue, all you have to do is to:
- Open phone cover and clean the display unit as well as the hole where speaker is placed
- If there is too much dust then it is better to replace it rather than cleaning it.
If there is no sound at all while calling or receiving calls then all you have to do is to restart your phone.
For Low Sound
The only reason for this is that your speaker is faulty, and you need to change it in order to overcome this issue.
Hardware solution
In order to have a hardware solution of the speaker problem, all you have to do is to:
- Check volume level in first place.
- Verify whether the strip or connector has encountered any kind of physical or water damage, if it has, then replace it.
- In the above figure you can see + and – Terminals near connector P1 and P2 (marked as red), make sure that they are working fine.
Problems
There are two main problems that are found in Primary and Secondary Mic of Samsung Galaxy S3
- No sound is accepted by the Mic
- Mic goes Mute while calling.
- Noise filter cap must be displaced or damaged.
- Mic might be dry soldered.
- Any of the IC or components might be faulty.
- Audio Codec might be faulty.
The potential solution is only for Mic goes mute while calling. If your Mic is only working when you record your voice, while it turns off/mute when you make a call then it is due to the noise filter cap, and it happens when it is damaged. Basically noise filter cap is a black colored rubber cap that covers the Mic hole for damage protection. If it is the case then all you have to do is to replace that cap!

If your Mic is only working when you record your voice, while it turns off/mute when you make a call then it is due to the noise filter cap, and it happens when it is damaged. Basically noise filter cap is a black colored rubber cap that covers the mic hole for damage protection. If it is the case then all you have to do is to replace that cap!
Hardware Solution

If no sound is accepted when you speak from the Mic, then all you have to do is to:
- Go to settings in your Samsung Galaxy S3, and try to record your sound using sound recorder.
- The Mic might be dry solder; therefore you need to reheat the Mic from bottom.
- Now trace the circuit for Mic by using above schematic (Check Primary Mic figure)
- Check the capacitor (marked in red circle), If it is working fine then check the black colored IC, (It is the interface for both Primary and Secondary Mic), replace that IC and check
- Now check the Audio Codec by applying heat or go with re balling, replace it if necessary.

Your Samsung Galaxy S3 buzzer might have the following problems:
Problems
- Noisy or low Buzzer sound
- No Buzzer sound at all
- Sticky dust over buzzer’s diaphragm or dust over the buzzer shield.
- Buzzer might be water damaged.
- Buzzer connector or strip might be damaged / or any other component.
- Connector’s pin might be damaged.
Noisy or Low Buzzer Sound
It must be due to the sticky dust over Diaphragm or protection shield over the buzzer, and in order to overcome that, all you have to do is to replace the buzzer part.
No Buzzer Sound
If there is no buzzer sound at all then all you have to do is to check the mute settings of Buzzer, and if it isn’t mute then:
- Check the strip as well as the board connector for any physical or water damage.
- Clean and solder connectors pin and proceed.
- Check all the components (Marked with red rectangular in figure), If any of them is faulty change them.

Problems
- No voice in headset when Audio Jack is connected.
- Low voice in headset.
- Headphones might be faulty.
- Volume might be low or muted.
If nothing happens when you insert your HD jack into your phone then:
- Check your head set’s volume settings.
- Replace your headset with a better one and if it still doesn’t work then the problem is with your Samsung Galaxy S3 audio jack.
- Check the board connector that is connected with buzzer strip and includes HD Jack. That is all what you have to do in order to over this problem.