24” LCD Color Monitor BenQ E2400HD
48
(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 U701 Pin2=3.3V, U702 Pin2=1.8V
OK
NG
Replace U701, U702
Check if the Pin 3, 4 of CN701 are 5V input
Check power board
NG
OK
Summary of Contents for E2400HD - 24" LCD Monitor
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Page 53: ...24 LCD Color Monitor BenQ E2400HD 53 PCB LAYOUT Main Board...
Page 54: ...24 LCD Color Monitor BenQ E2400HD 54 Power Board...