ViewSonic VS11354 Service Manual page 44

6. Black Screeqn and backlight turn on
Black Screen
Check Power Supply:
Pin 1, 2 of CN101
Check Power:
Pin 2 of U101 and Pin 2
of U102
Check Reset Waveform
(Pin 84 of U105)
Check Crystal Waveform
(Pin 96,97 of U105)
U105
(TSUM16AL) Fail
ViewSonic Corporation
OK
OK
OK
OK
NG
NG
NG
NG
Confidential - Do Not Copy
41
Power Fail
U101, U102 Fail
Check C144 and
R172
Check X101,
C153, C154
VG1921wm-2