We don't have sound device in our system and also no CDs

Most likely some one hit the wrong button on the remote. Make sure you have the proper device selected and the tv is setup for the proper device input. It is hard to tell you what is exactly wrong due that I do not know the full extend of your system.

Hi Amit,I'm not sure how you've managed to lose all that as it's all part of the system and not normally accessible to be removed.
Bluetooth should have a control in the menu bar next to the wifi sysmbol.
Sound control is in system preferences and generally offers several output options - make sure you have not got it set to optical.
You can check the webcam by launching Photobooth. If you can see yourself then you have not lost the driver you have a setting incorrect somewhere. - Make sure it's not set to some external device.
If not of that produces results, the best thing to do without poking around and causing more trouble is to use your system CDs/DVD and reinstall the system. Don't do the 'Erase and Install' as that will wipe your HD, do the simple install (the first option). If the macbook has been updated then it will warn you and you will have to the the 'Archive and Install' Option. After that you should have your bits working again.

Try my hint on how to restore a laptop to factory settings. http://www1.fixya.com/support/r10606238-restore_computer_factory_default
If your laptop doesn't have a restore partition, you should have received CDs with the computer that will restore the system. If you don't have either, try to find a friend who has the CDs. Acer will charge you a fortune for CDs.
Jim

Perform a System Restore If Necessary:

• Step 1 - If the sound has been audible from your computer's speakers and is suddenly lost, you may need to perform a System Restore. Click on the " Start" button and then "All Programs."
• Step 2 - Click on "Accessories," then "System Tools," then "System Restore."
• Step 3 - Complete the System Restore Wizard. If this doesn't work, read on.

Delete And Reinstall the Original Sound Drivers:

• Step 1 - Deleting and reinstalling your sound driver may resolve the problem. Your sound driver may have been corrupted or may be missing. The result of this is that the restore utility menu won't be available. For Windows XP, follow these steps.
• Step 2 - Click on your "Start" button. Click on "Control Panel" and then "System." Next, click on "Hardware," then "Device Manager, then "Sound, Video and Game Controllers."
• Step 3 - Click on a sound device named in the Device Manager, and then press the Delete key on the keyboard. Click "OK" in the window that appears. Remove all the listed sound devices i this way EXCEPT Audio Codec and Legacy Audio Drivers.

• Step 4 - Restart your computer. Reinstall the deleted drivers using the Driver and Application Recovery CDs that came with your Windows XP system.
• Step 5 - Visit your computer manufacturer's official website. Check for any updated sound driver software for your sound card. If any, download them along with the installation instructions.

Do you have Driver CDs?
Is your Operating system still working?
Do you have Recovery Disk?

If you have Driver CDs.there will be no any problem to reformat.
if you don't have the CDs and our system still working,just make out the Drivers which you need.
If you have Recovery Disk,its so easy to reformat

There are a number of different reasons why your computer may no longer give sound. If you have this problem, read on to learn how to diagnose the problem and resolve your PC's loss of sound.
Instructions Things You'll Need

• Driver and Application Recovery CDs
• Updated sound driver software

Check the Speaker Connections and Volume Control Settings

1. • Verify that the lack of sound is not due to faulty speaker connections. A simple way to test it is to substitute the speaker connection with headphones and see if you get any sound.
   • Open the volume control window by clicking your "Start" button and then "All Programs." Click "Accessories," then "Entertainment," then "Volume Control." Alternatively, just click on the speaker icon that's in your System Tray.
   • Check the volume and mute settings. If any of the mute check boxes have been checked, uncheck them. If this doesn't work, read on.
   Perform a System Restore If Necessary
   • If the sound has been audible from your computer's speakers and is suddenly lost, you may need to perform a System Restore. Click on the " Start" button and then "All Programs."
   • Click on "Accessories," then "System Tools," then "System Restore."
   • Complete the System Restore Wizard. If this doesn't work, read on.
   Delete and Reinstall the Original Sound Drivers
   • Deleting and reinstalling your sound driver may resolve the problem. Your sound driver may have been corrupted or may be missing. The result of this is that the restore utility menu won't be available. For Windows XP, follow these steps.
   • Click on your "Start" button. Click on "Control Panel" and then "System." Next, click on "Hardware," then "Device Manager, then "Sound, Video and Game Controllers."
   • Click on a sound device named in the Device Manager, and then press the Delete key on the keyboard. Click "OK" in the window that appears. Remove all the listed sound devices i this way EXCEPT Audio Codec and Legacy Audio Drivers.
   • Restart your computer. Reinstall the deleted drivers using the Driver and Application Recovery CDs that came with your Windows XP system.
   • Visit your computer manufacturer's official website. Check for any updated sound driver software for your sound card. If any, download them along with the installation instructions.

I hope this information will be helpful. Thank you for using FixYa!

get an aftermarket deck. If you don't have the bose system, the OEM non bose does NOT play mp3 cds. It only plays audio cds or burned audio cds. It does have the aux jack if you hook up an mp3 player or your iphone/android phone to play Pandora using a headphone cable.

YOU WILL PROBERLY NEED TO INSTALL OR UPDATE YOUR SOUND DRIVER

it seems taht motor that spins the cd is going bad.

I think the peoblem is that you need to set the cdrom as first boot device, go into bios (F2 or Del on boot up) and enter advanced cmos settings and you will find that the HDD (Hard disk) is set as first boot device, change this with up/down keys or + - keys to cdrom as first boot device. save settings and exit for a restart with cd in drive.