18.5” LCD Color Monitor BenQ G920HDA
47
(2) No picture
No picture
OK
NG
X401 oscillate waveforms are
normal
Replace X401
Check if the sync signal from
computer is output and video cable
is connected normally
Input the sync signal of computer, or
change the cable
NG
OK
NG
Check U401
Replace U401
Measure U201 Pin2=3.3V
OK
NG
Replace U201
Check if the Pin 3, 4 of CN201 are 5V input
Check power board
NG
OK
Summary of Contents for G920HDA
Page 27: ...18 5 LCD Color Monitor BenQ G920HDA 27...
Page 32: ...18 5 LCD Color Monitor BenQ G920HDA 32 3 Remove the Bezel Remove the bezel as follow Fig 3...
Page 52: ...18 5 LCD Color Monitor BenQ G920HDA 52 PCB LAYOUT Main Board...
Page 53: ...18 5 LCD Color Monitor BenQ G920HDA 53 Power Board...
