Acer AL1516 Service Manual - Page 33
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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
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,
X401 oscillate waveforms are
normal
No power
NG
NG
OK
U702 PIN2=3.3V
NG
OK
OK
Replace U401
Reinsert or check the
power section
Measure CN701 PIN5/6=12V?
Measure CN701 PIN9/10=5V?
NG
OK
Replace U701, U702
NG
Replace X401
32
Chapter 4
Check power section