4-4
4. Troubleshooting
4-3. When the screen is blank (Analog)
Symptom
- Even though the LED power turns on, the screen is blank when connecting the DVI-I to D-sub
cable.
Major checkpoints
- Check the DVI-I to D-sub cable connections.
- 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
IC602
IC601
CN700
Yes
No
Check the R113, R117 and
R120 input terminals.
No
Check the circuits related to
IC200.
No
Check the circuits related to
CN400.
Do output signals appear at pins 8 to 30
of CN400?
No
Is DC 5V measured at pins 1, 2 and 3
of CN400?
Do the
③
Hsync and
④
Vsync
waveforms appear at pins 32, 33 of
IC200, respectively?
②
Do the RGB inputs appear at R113,
R117 and R120 of CN102?
①
Is X201 oscillating correctly?
Check and replace the panel.
No
Check and replace the circuits
related to X201.
Yes
Yes
Yes
Check the +5V_PANEL signal
and the BL_EN signal.
Yes
Check the signal cables and
their connections.
Yes
Caution
Make sure to disconnect the power before working on the Adaptor.
All manuals and user guides at all-guides.com
Содержание LS23EFV
Страница 7: ...3 4 3 Disassembly and Assembly Memo All manuals and user guides at all guides com ...
Страница 21: ...1 4 1 Precautions Memo All manuals and user guides at all guides com a l l g u i d e s c o m ...
Страница 51: ...6 4 6 Wiring Diagram Memo All manuals and user guides at all guides com a l l g u i d e s c o m ...
