MacBook Pro internal speakers disappeared and keyboard won't light up

yesterday I realized my internal speakers were not working on my MacBook Pro. The red light comes off in the headphone jack. I tried to plug my headphones and take them out to get my computer to recognize the internal speaker but nothing seems to be working. i was using mountain lion so I decided to install yosemite to see if that would fix my problem but it did not. In fact this morning after Yosemite was installed I noticed that my keyboard lights were also "locked" just like my speakers. I tried the PRAM reboot and the sudo terminal code but none of these have worked so far... Any ideas of what I could do?
I Would like to specify that in my preferences for sound nothing is muted not is the wrong device selected, there are no devices available as if my internal speakers had disapeared

1. Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so, uncheck it.
    Make sure that CH1 and CH2 volume sliders are at the middle and matched.
2. System Preferences > Sound> Sound Effects
    Play sound effects through:
   Select "Internal speakers" and then back to "Selected sound output device".
If this does not help, you have to take the computer to the Apple store to have it checked out.
Best.

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