This information is just in case you are not aware.
Always make sure your computer is unplugged from the wall socket when you do any work on it. Safety steps.
Before touching anything inside the computer and when picking up any part, briefly touch a bare metal part of the computer case, this is to discharge any static electricity stored in your body. Bit boring but very important as stic dicharge can severly damage computer parts and may not show up straight away.
Looks like the SM Bus driver is missing, so a hopeful repair by doing the following please.
Take safety step.
Unplug the cable to the Graphics card.
Remove the Graphics card, store it inside
the bag it came in.
Start the computer.
Go to this site, > http://www.intel.com...ect?iid=dc_iduu
On the window that opens, Click on the blue bar,
You may get a warning security pop up, Please allow the tool to run.
Let us know what is the result?