Update: I removed all the SSDT and I have a good internet connection via ethernet. App store and iCloud all work fine.
I noticed that there are no output sound devices, so when I play a YouTube video in the browser, there is no audio. Also, when I try to play a mp4 video stored on the computer using VLC, it does not show the video frames-- also no audio since there is no output sound device.
The next issue is not important for me, but I will note that the wifi and bluetooth do not work.
Is there anything I can do next or are some of these hardware issues not yet resolved?