I just bought my new macbook air today, and suddenly after playing with the text to speech to iTunes- the sound stopped altogether, i get nothing. I just bought this a few hours ago! what do I do?

okay going to have a bash at solving this but it's a little hard based on your description. I'm guessing this has Mavricks operating system installed.

1. Choose Apple menu > System Preferences, click Dictation & Speech, then click Text to Speech.
3. Select the "Speak selected text when the key is pressed" checkbox. By default, speaking is enabled when you press Option-Esc. To choose a different key, click Change Key, press one or more modifier keys (Command, Shift, Option, or Control) together with another key, then click OK.
4. 
   
5. To have your Mac start speaking, press the specified key. To stop the speaking, press the key again. If text is selected when you press the key, the selected text is spoken. Otherwise, available text items in the current window are spoken; for example, if Mail is the current window, an email message is read. If no text items are available, you hear a beep.
   So based on what you have described you have already found this option and set the change key to "command" + "e"
   Try rebooting then going to the text to speech option and attempt to set the key combination you want it to be. If this fails to change then try resetting the P-ram which should set it back to the default.
   
   

OS Mavericks Reset your computers PRAM

check if your flash version is up to date.

Although i cannot play video, i will try to help.....Have you noticed any problems with the speed options for the fan? Did you hear any noises with the fan prior to stopping altogether. If so, you may need a new resistor for the blower motor or a new motor itself.

Download "Omni Disk Sweep" ; it will tell you what program is hogging the disk space.

You laptop may have sound prefs set to external speakers, or if there is a red light coming from the headphone jack. the mac thinks the headphones are still there.
Plug in and unplug the headphones an see if the red light goes out. may take a couple of times. Be gentle

Try to update the Itunes and Mac OS X.this can solv the issue

there is no backlight or vga fault posible to fix Micromend London goop poeple

It sounds like the sound card on the main board has gone out. Since you have a Mac Airbook, I will almost guarantee that it is still under warranty and you should be able to go to apples website and make an appointment with the Genius Bar at the local store and then have them repair it for you. Back up any important data before you do this, including your itunes music collection and your photos.

left you a message on phone..do you have this link for updates?

Here's the audio driver: http://www.csd.toshiba.com/cgi-bin/tais/su/su_sc_dtlViewDL.jsp?soid=1043305&moid=1042107&rpn=PSM43U&BV_SessionID=@@@@0159702921.1188418701@@@@&BV_EngineID=cccdaddllgjjdegcgfkceghdgngdgmn.0&ct=DL&all_docs=false To fix your cd drive not recognized, do this: Choose Start > Run. Type regedit in the Open text box. Navigate to this registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} Then delete it.