Acer PH112 Service Manual page 37

Fail to light up
Check
LED indication
OK
Check
Lamp
OK
Check
Thermal
Sensor
OK
Check
Fan
OK
Check
Main Board
OK
Check
Ballast
Chapter 4
Look up user
NG
manual ,and
follow indica-
tive action
NG
Replace Lamp
NG
Replace Ther-
mal Sensor
NG
Replace Fan
NG
Replace Main
Board
NG
Replace
Ballast
No Volume
Check
Top cover's cable
OK
Check
Speaker
Connector
OK
Check
Speaker
OK
Check
Main
Board
OK
Replace Main
Replace cable
NG
or connect the
cable back
NG
Speaker
Connector
Become loose
NG
Replace
Speaker
32