Is the Primer really shutdown, is the screen stalled white or black ?
Did it shutdown when the application was running ?
The first thing to do is to try to reload the factory binary.
Download the "Primer2_Upgrade v3.8.zip" in resources pages, then launch the "Restore_Primer2_Circle_Factory.bat" when maintening the Primer button pushed.
If the check fails, verify the power supply voltages, and take a look at the "Resources/Resolve Known Problems" section.