Sound only from internal desktop pc speaker. Headphones and speaker not recognized

[sheryldotrock]

Help please! I recently moved my desktop from one room to another and at first decided to rest it on its side instead of flat. When I turned it on, it began flashing red and the fans began high speed blowing that I have never experienced before (I could feel the air being blown out of the front and rear of my pc. I turned it off (It wouldn't go into start mode), rested it flat, checked the power connection (which was slightly pulled out on one side) which I firmly plugged back in, and turned it on. This time everything appeared fine throughout startup. So I opened my browser and went to a Youtube page I was interested in. The video loaded and the sound, instead of coming through my headphones as usual, began to come from the front internal speaker. My pc no longer recognizes the front headphone jack nor the rear audio output for speakers. I have always used this headphone port (there is no other) and never experienced problems before; the "move" was gentle as well. I have the most recent release of the Soundmax software as well. Also, this update was a few years ago and I could swear at the time my system was using Realtek as the chipset driver and in my quest into my system for answers, I could swear I saw Realtek listed as a driver for something but now all I find is Soundmax. (I checked for the settings through so many different ways, I can't remember which one revealed Realtek). Does anyone out there have a clue about this? I'd like to listen with my headphones again if possible and one day speakers. Hp dc5800 Small Form Factor, Windows 7 Sp1. All updates are current.

Thank you and God Bless!