Audio playback and waveform gone

I have been using Premiere CC for months now and haven't had any issues. I see discussions cover similar issues but I am not having any luck with those solutions.
My project was working fine. I reopened it the next day to work on it and all the audio waveforms were gone on the timeline. It could play in the source monitor but not playback. I started over because I figured it was something I had done. I fixed it manually and shut the program down. I reopened again today. No audio or waveforms. Some of the clips kept the waveforms but still won't play. I exported to see if it was just in playback and no sound.
I am not a pro with Adobe so I need a very detailed break down of what could be the problem

Hi emantey1013,
Have you used ant third party effects, plugins, After Effects composition or Plural Eyes synced audio and video in you project? If not then try the steps listed below.
Go to File>Export>Final Cut XML and export your project
Create a new project and inport that XML in it
Open your sequence and check if you get the audio or not
Regards,
Vinay

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Message was edited by: SWLinPHX

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It might be an issue with firmware of your system, I would like to suggest you please visit the below mentioned web link to download and install few drivers according to your Operating System.
support.lenovo.com/en_SG/downloads/default.page?
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Audio playback and waveform gone

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