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5.2 Nothing displays on the screen (Screen is black and colour of LED is blue.)
Check if the backlight is
slightly lightened from upper
corners (right/left) of LCD
panel
OK
Does RGB video
signals output
from connected PC host?
OK
Check if OSM menu
is displayed upon pressing the
MENU key
OK
Proceed to 5.4 Abnormal Screen section.
supplied from I301 pin2; 2.5V is
supplied from I303, pin2, and
the 1.8V power is supplied from
Check all LVDS signal pins;
1. The cable is broke between
P306 and LCD panel.
2. LCD panel is defected.
5. Troubleshooting (continued)
NG
Proceed to 5.3 Checking the backlight unit section
1. Change pattern of video signal outputs from
the PC host to optimum resolution.
NG
2. Reconnect the video cable.
3. Cross-test the other workable video cable.
Check if video signal cable
NG
is connected properly between
LCD monitor and PC host
OK
Check if 3.3V is
NG
I302 pin2.
OK
output from I314
OK
NG
Failure Point
NG
The cable is disconnected.
Check if the
Voltage on I301, I303,
NG
I320 pin3 is high DC
level at 5V.
OK
Failure Point
I301, I302, I303, or I320 is
damaged.
Failure Point
Printed wire is broke or short
between P306, I314
ACER P243W
Go to cover page
Failure Point
Failure Point
1. Printed wire is broken between
P301 pin1, pin2, pin3, pin4 and
I301, I303, I320.
2. Check power board
21
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