You connect your monitor to your desktop with a VGA, DVI, DP, Mini DP, HDMI, etc. port, is there a port (slot) as mentioned early to hook up your monitor without using the off board GPU installed. I'm sorry for being terse in my question about lightroom. I was simply asking as you answered in your more recent post. That opening the picture in lightroom caused (or seemed to have caused) the crash.
Basically what were trying to find out is if the machine is POSTing or is it simplly just showing there is power running and no real computation is happening. With the use of onboard gpu and not using the slot enabled gpu (hence graphics "card") you can determine further where the issue lies.
The single short beep would imply that POST (Power-On Self-Test) has passed and the machine is operating but further investigation is necessary.
To tell if the HDD is spinning up you can touch the back end of the HDD while the computer is starting up (may take a few seconds), to feel for vibrations in the drive that indicates it is working. Of coarse you may still feel vibrations of the fan, and this does not help. It is hard to describe but I'm sure you will know the difference.
The CPU fans spinning up just tell you there is power nothing else can be ascertained (except that power is present) by this.
I also insist you try another monitor if it has a HDMI port you can use a tv with HDMI available to test, but again just another item to cross of the list in our forward endeavors to help fix the issue at hand.
Lastly it is always good to copy (ctrl+c) and paste (ctrl+v) the questions someone asks you, and answer then in your reply so we can better follow your answers. (assuming you are computer literate enough to know this)
I hope none of this message comes off as being offensive as this is simply not the reason of any text in this post, but rather to be informative and helpful.
Again I hope the troubleshooting steps that we all provide helps you to resolve your issue. If you are unclear about anything in this post please feel free to pm (private message) me with a URL link to this thread and your question. I will gladly get back to you in a quick and orderly fashion.