ViewSonic N4200w-1 VS10945-1M Service Manual page 77

VGA mode
Check CN17
R.G.B signal
YES
Check U41
HDMI mode
NO
Check
CN14&CN3
YES
NO
Check
U46.U55.U56
U47,U57,U58
YES
Check U40
NO
ViewSonic Corporation
NO
Check input signal
NO
Replace U41
Check input
signal
Replace
U46.U55.U56
U47,U57,U58
NO
Replace U40
Check power for U51,
CN45&CN59
Replace U51
Check LVDS
wireharness
Check U11
YES
Check U54
YES
Check U51
NO YES
Check panel
power 24V
Replace panel
YES
76
Confidential - Do Not Copy
NO
Check power for
U11.U9.U5.X1
NO
Replace U54
NO
Check panel/
power board
YES
N4200w-1