I had my state inspection completed at the normal facility. They just checked the lights, horn etc, no big deal, even the Diesel they didn't do anything different. Try your local garage (as long as they have space for you to get in there)
I was able to find a 12v adapter for my netbook that allowed me to wire it into the chassis and hide the wire for mine. I also was able to find product called minimount that allowed me to put the netbook into a hard case and mount it to the floor. I actually use mine for watching engine performance though silverleaf.
Either bad ground or the computer is having some issues. With mine it was the computer (known issue with the early 2000's). The first time it happened to me the alarm went off and I grabbed the steering wheel bracing for a abrupt stop then it went back to normal. You may want to bring it into freightliner and have them check it out.