M e d i a P C M P C - 8 8 9 0Chapter 2 Quick Installation Guide 2 - 132.10 Clear CMOS (JP6)JP6 Function1-2 Protected (Default)2-3 Clear2.11 COM4 Function Selection (JP7)JP7 Function1-3, 2-4 Set to Pin Header (Default)3-5, 4-6 Set to Touch screen Controller2.12 LCD Voltage Selection (JP8)JP8 Function1-2 +5V2-3 +3.3V (Default)