Acer AT4250B Service Manual page 29

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