Service manual

Black Screen
Check M/B Panel
ON/OFF CN7
PIN 8 3.3V
Change Power Board
Check M/B
CN7 PIN 7
Brightness MAX
3.3V
Change Scalar M/B
Change Scalar M/B
NG
NG
NG
Check Panel Vcc
5V
Panel Break
Viewsonic Corporation 55 VP2130b-1 Confidential - Do Not Copy