Kindly I ask your attention.
Did you check of all is still good connected inside?
I didn't do that reinstall, I went back to the girl friend and connected the monitor to the system and set everything back to the way it was. Do the Icon size the way it was and give it a try.
Did you use the correct resolution at the little monitor?
Or is it automatic?
What are they at the little monitor and the tv?
Hopefully I let you known enough, that you will find the answers you seek.
Good luck and have fun doing it.
Will the BIOS shown when you start your system, or is it just the Windows version you have installed?
Well, the graphic software will have a manual monitor detection, try it.