ViewSonic N4200w-1 VS10945-1M Service Manual page 78

11.4. No PIP Display
Check every input
Jack. Connector
YES
Check U18
YES
Check U11
YES
Check U54
YES
Check U51
YES
Check panel
power 24V
YES
Replace panel
ViewSonic Corporation
NO
Check input signal
NO
Check U18 power
NO
Check power for U11.
U9.U5.X1
NO
Replace U54
NO
Check power for U51.
CN45.CN59
NO
Check panel/power
board
NO
Replace U18
Check U23.X3
NO
YES
77
Confidential - Do Not Copy
Replace U51
Check Lvds
wireharness
N4200w-1