AOC F19L - Trouble Shooting Guide

18.5" LCD Color Monitor AOC F19L
38
9.2 Trouble Shooting
9.2.1 Main Board
1. NO SCREEN APPEAR
715G2883 1 6
No power
No power
Press power key and look
if the picture is normal
Please reinsert and make sure
the AC of 100-240 is normal
Measure U104 Vout=3.3V
ZD104,ZD105 VC=5V
Reinsert or check the
power section
X401 oscillate waveforms
are normal
Measure CN101 PIN5/6=5V?
Measure CN101 PIN9/10=5V?
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG
Check power
section
NG
OK
Replace U104, ZD104, ZD105