Iphone3g have not sound

That can only happen I think if you have the speakers connected to the wrong terminals. Check the connections and make certain they are right, plus the wire is good and not touching any parts it shouldn't

The four speakers are split into two groups left and right. You connect the positive terminal on the upper left speaker to the positive terminal on on the bottom left speaker. Then repeat process connecting negative to negative on the same two left speakers. Then connect one wire from the upper left positive to the positive connector on the jack that is marked 4ohm LEFT on the plate attached to the rear of the speaker cab. The do the same connecting a wire from the negative terminal to the negative terminal on the same left jack. Now repeat the process on the right side in exactly the same way this time connecting to the 4ohm RIGHT jack. The switch that is in-between the two jacks can be set for either channel or for both together for stereo at 8 ohms HOPE THIS HELPS

Your bottom speakers may be damaged and have to be replaced. Do you have the problem when listening through the top speaker with your ear?
If not I can guarantee thats most likely your problem.
You can take it into apple and get them to double check and confirm.

Hello,
there are three basic reasons why the leapster explorer won't bring out sound.
1. Defective speaker
The speaker of your leapster explorer maybe defective, this can make it not bring out any sound. Disassemble the leapster explorer, check the speaker part, test the speaker with a AA battery. If you hear any sound using the battery, then it means there is nothing wrong with the speaker.
2. Loose wire connection
Disassemble the leapster explorer, check the wires connecting the speaker to the board. Check for any wire cut, or loose connection which can cause the speaker not to bring out sound. . 3. Sound IC/Card/Board
If non of the above is the cause of the problem, then it means the leapster explorer is having a defective sound ic/board/card. There is an IC on the board of the leapster explorer which is responsible for sound. If this ic has a shot, there won't be any sound. If this be the cause, I think it's high time to took the leapster explorer to a repairman because this requires skill.
I hope the above is clear. If not, please let me know for further assistance.
Regards.

if your computer came with a motherboard disc the sound drivers could be on it
click start control panel administrive tools computer management device manager scroll to sound,video and game controllers you might see a yellow question mark? Right click to reinstall drivers or uninstall
click start control panel sounds and audio,volume,advanced,speakers make sure you have selected the
(((appropriate speakers))) also audio you will find 3 drop down lists make sure you have the correct settings there
also
click start control panel sounds and audio devices you can adjust the volume there also select speaker volume you can change your settings there you can also tick in the box place icon in taskbar
if his does not fix the problem

have you tried this control panel sounds and audio,volume,advanced,speakers select the appropriate speakers from the drop down list or navigate to the device manager scroll to system devices + to expand,system speaker right click properties then select use this device (enable) also you might check
the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the sound card and the CPU central processing unit dust causes static to build up in a computer
make sure you have an earth ******** before touching any parts inside your computer

1. In bottom right of your taskbar is an icon of a small speaker, click on that and make sure the slider bar is at 100%.
2. Click the windows button in lower left corner and then click on control panel. Then click Hardware and Sound, then click adjust system volume and make sure those are at max volume and not muted.
3. Depending on your system there may be software that installed to manage your sound card or onboard sound, if there is usually there will be an icon representing it on the lower right of your taskbar. Open that and make sure sound levels are set to max and not muted as well.
4. Make sure you plugged the speakers into the right jack in the back, sometimes when plugged into the wrong hole you can faintly hear sound but thats it, USUALLY its the light green jack you want but that can vary (some sound card/connections will have small icons by each of the colored jacks as well though they are usually faint and kinda hard to see...they can help make sure speakers are plugged into the right spot)
5. Its possible your speakers are just old or defective and simply need replaced.

if your computer came with a motherboard disc the sound drivers could be on it
you might have to uninstall then restart your computer then reinstall both the sound drivers and the sound card make sure you have both of these devices backed up to a disc before uninstalling
a yellow? question mark means you need to install/update driver to do this
right click to install driver also
click start control panel administrive tools computer management device manager scroll to sound,video and game controllers you might see a yellow question mark? Right click to reinstall drivers
click start control panel sounds and audio,volume,advanced,speakers select appropriate speakers also audio you will find 3 drop down lists make sure you have the correct settings there
also
click start control panel sounds and audio devices you can adjust the volume there also select speaker volume you can change your settings there you can also tick in the box place icon in taskbar
if his does not fix the problem

have you tried this control panel sounds and audio,volume,advanced,speakers select the appropriate speakers from the drop down list or navigate to the device manager scroll to system devices + to expand,system speaker right click properties then select use this device (enable) also you might check
the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the sound card and the CPU central processing unit dust causes static to build up in a computer
hope this helps
don

Check and adjust the sound balance in sound properties will resolve your problem.

Revert back for more assistance.

First check if you have the speakers pin (green) connected in tothe proper green socket on the back of the computer.

If yes, then right click on the sound / speaker icon that is near to your clock on the right bottom, and click "Adjust audio properties"

Now click the sounds tab in the audio properties.

Select any sound from the list under program events, and click the play button near the browse button. It should play a sound.

If you are not able to hear any sound BUT the play icon changes to the stop icon for a few  moments, it means the sounds play alright but something is wrong with the speakers or the connections.

HTH,
Deboo

goto CONTROL PANEL>Sounds & audio Devices(icon). goto VOLUME, far left menu option.Just under VOLME you should see a ICON of a speaker & the name of the audio device\driver. [If you don't u don't have a audio device INSTALLED] Make sure that the MUTE is not checked.,place a check ['place volume icon in the taskbar] ( that is the RIGHT bottom)On the left bottom of the same"volme" click "speaker volume" and raise the volume. GOTO >SOUNDS(sbmenu)>program events(windows>Asterick,Close Prgram,critical Battery Alarm,Critical Stop,Default Beep,etc,etc)
UNDER:: sounds, look & see if a sound is "taged", just to the right there is a "right" arrow that should be BLACK. When you touch the "arrow" the sound that u "taged" should sound.(1st) goto AUDIO >Default device: you HAVE to see some type of "audio device" e.i. Sound Blaster, Conexant AMC ,ABC Bananers,some type of audio device! If not, left click mouse DARK "arrow" down to see if you have some type of adio device\driver.If so chooze it.(2nd) goto VOLUME AND raise the volume.(3rd) Go back to "sounds" & while you click the dark arrow facing right, connect the speaker jack to the back of the "FEMALE" port.Sometimes they are not marked and you could connect to the wrong port.example: mike in instead of speaker out. understand!