When The Screen Is Blank (Analog) - Samsung 2263UW Service Manual

4. Troubleshooting

4-3. When the screen is blank (Analog)

Symptom Though the LED power turns on, the screen is blank when connecting the VGA cable.
-
Even though the LED power turns on, the screen is blank when connecting the VGA cable.
-
Check the D-sub cable connections.
Major -
checkpoints
Check whether the LVDS cable is connected correctly to the panel.
-
Check whether the lamp connector of the panel is connected correctly to the IP board.
-
Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
4-4
Check the signal cables and
their connections.
Yes
① Is X200 oscillating correctly?
Yes
② Do the RGB inputs appear at
R104, R107, and R111?
Yes
Do the ③ Hsync and ④ Vsync
waveforms appear at pins 32, 33 of
IC202, respectively?
Yes
Do output signals appear at pins 8 to
30 of CN100
Yes
There are DC 5V at Pin 1, 2 and 3 of
CN100?
Yes
Replace LCD Panel.
IC202
X200
R104, R107, R111
Main Board Front
No
No
No
No
No
CN100
Replace or check related
circuit.
Check input part.
Check IC202 and related
circuit.
Check CN100 and related
circuit.
Check the +5V_Panel signal
and the BL_EN signa