Acer AL1516 - Chapter 4 Troubleshooting

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Troubleshooting
This chapter provides troubleshooting information for the AL1516:
The way of accessing to the factory mode:
Firstly, turn off the power and remove the power plug, then press the menu key and plug in at the same time,
finally, press the menu again will activate the factory mode, the factory OSD will be at the left top of the screen.
Main board
1. No power
Chapter 4
OK
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 U701 PIN2=3.3V,
U702 PIN2=3.3V
Reinsert or check the
power section
X401 oscillate waveforms are
normal
Measure CN701 PIN5/6=12V?
Measure CN701 PIN9/10=5V?
OK
OK
NG
NG
NG
Replace U401
Replace X401
OK
NG
Check power section
Replace U701, U702
NG