Philips BDL4230E/00, Service Manual

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BDL4230E LCD 7
Troubleshooting
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Symptom Possible Cause Remedy
No picture is displayed
1. The power cord is disconnected.
2. The main power switch on the back of the
monitor is not switched on.
3. The selected input has no connection.
4. The monitor is in standby mode in VGA mode.
1. Plug in the power cord.
2. Make sure the power switch is switched on. 3.
Connect a signal connection to the monitor.
Interference displayed on the
monitor or audible noise is heard
Caused by surrounding electrical appliances,
cars/motorcycles or fluorescent lights.
Move the monitor to another location to see is the
interference is reduced.
Color is abnormal The signal cable is not connected properly
Make sure that the signal cable is attached firmly to
the back of the monitor.
Picture is distorted with abnormal
patterns
1. The signal cable is not connected properly.
2. The input signal is beyond the capabilities of
the monitor.
1. Make sure that the signal cable is attached firmly.
2. Check the video signal source to see if it is
beyond the range of the monitor. Please verify its
specifications with this monitor’s specification
section.
Display image doesn’t fill up the
full size of the screen
The zoom mode is not correctly set.
Use the ZOOM MODE or CUSTOM ZOOM function
in the SCREEN menu to fine tune display geometry
and time frequency parameter.
Can hear sound, but no picture Improperly connected source signal cable.
Make sure that both video inputs and sound inputs
are correctly connected.
Can see picture but no sound is
heard
1. Improperly connected source signal cable.
2. Volume is turned all the way down.
3. MUTE is turned on.
4. No external speaker connected
1. Make sure that both video inputs and sound
inputs are correctly connected.
2. Use VOL UP / VOL DOWN button to hear sound.
3. Switch MUTE off by using the MUTE button.
4. Connect external speakers and adjust the
volume to a suitable level.
Some picture elements do not
light up
Some pixels of the display may not turn on.
This monitor is manufactured using an extremely
high level of precision technology: however,
sometimes some pixels of the monitor may not
display. This is not a malfunction.
After-Images can still be seen on
the monitor after the monitor is
powered off. (Examples of still
pictures include logos, video
games, computer images, and
images displayed in 4:3 normal
mode)
A still picture is displayed for an over extended
period of time
Do not allow a still image to be displayed for an
extended period of time as this can cause a
permanent after-image to remain on the monitor.