When The Screen Is Blank (Analog) - Samsung PX2370 Service Manual

4. Troubleshooting

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

- Even though the LED power turns on, the screen is blank when connecting the DVI-I to D-sub
Symptom
cable.
- Check the DVI-I to D-sub cable connections.
Major checkpoints - Check whether the LVDS(FFC) cable is connected correctly to the panel.
- Check whether the lamp connector of the panel is connected correctly to the Inverter.
Diagnostics
1 Is X300 oscillating correctly?
2 Do the RGB inputs appear at R119,
Do the 3 Hsync and 4 Vsync
waveforms appear at pins 66, 67 of
Do output signals appear at pins 8 to 30
Is DC 5V measured at pins 1, 2 and 3
Check and replace the panel.
Caution Make sure to disconnect the power before working on the IP board.
4-4
All manuals and user guides at all-guides.com
CN400
CN600
Yes
R122 and R124 of CN101?
Yes
IC300, respectively?
Yes
of CN400?
Yes
of CN400?
Yes
CN101
IC300
X300
CN601
Yes
Check the signal cables and
their connections.
Check and replace the circuits
No
related to X300.
Check the R119, R122 and
No
R124 input terminals.
Check the circuits related to
No
No Check the circuits related to
No
Check the +5V_PANEL signal
and the BL_EN signal.
IC200.
CN400.