Acer AT4250B series, Service Manual

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Start
Connect with AC
power code and RF
cable
Press Power
On/Off
Button to LED
color to show green
Panel to show
picture
Speaker with
sound
No
sound
Swap test fxture
LVDS cable
NTF
END
Yes
No No
No
Picture
Swap test fixture
Inverter Board
Replace
LVDS cable
No
No
Picture
Replace
Inverter Board
Swap test
fixture
LCD panel
No
Picture
Replace
LCD panel
No
Replace
Main Board
Replace
Power Board
To switch on
Power
LED to
show red
Power button LED
color with red
Yes
No
Upload F/W
Swap test fixture
Power Board
LED to
bright
Yes
LED to
show green
Yes
No
LCD panel with
backlight
Yes
LCD wth
backlght
Yes
Swap test fixture
Main board
LED to
show green
No
Yes
Replace On/Off
switch button
board
No
No
No
Yes Yes
Yes
TV NO PICTURE ISSUE
Chapter3 23