When The Screen Is Blank (Analog) - Samsung Р2370Н 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.
① Is X201 oscillating correctly?
Diagnostics
② Do the RGB inputs appear at R113,
Do the ③ Hsync and ④ Vsync
waveforms appear at pins 32, 33 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 Adaptor.
4-4
All manuals and user guides at all-guides.com
IC602
IC601
CN700
Yes
R117 and R120 of CN102?
Yes
IC200, respectively?
Yes
of CN400?
Yes
of CN400?
Yes
Yes
Check the signal cables and
their connections.
Check and replace the circuits
No
related to X201.
No Check the R113, R117 and
R120 input terminals.
Check the circuits related to
No
IC200.
No Check the circuits related to
CN400.
No
Check the +5V_PANEL signal
and the BL_EN signal.