Troubleshooting - Philips BDL4651VH/00 Service Manual

8 BDL4651VH LCD
Symptom
No picture is displayed
Interference displayed on the
display or audible noise is
heard
Color is abnormal
Picture is distorted with
abnormal patterns
Display image doesn't fill up
the full size of the screen
Can hear sound, but no
picture
Can see picture but no
sound is heard
Some picture elements do
not light up
After-Images can still be
seen on the screen after the
display is powered off.
(Examples of still pictures
include logos, video games,
computer images, and images
displayed in 4:3 normal mode)

Troubleshooting

Possible Cause
1. The power cord is disconnected.
2. The main power switch on the back
of the display is not switched on.
3. The selected input has no
connection.
4. The display is in standby mode with
VGA.
Caused by surrounding electrical
appliances, traffic or fluorescent
lights.
The signal cable is not connected
properly.
1. The signal cable is not
connected properly.
2. The input signal is
beyond the capabilities
of the display.
The zoom mode is not correctly set.
Improperly connected source signal
cable.
1. Improperly connected source
signal cable.
2. Volume is turned all the way down.
3. Mute is turned on.
4. No external speaker connected.
Some pixels of the display may not turn
on.
A still picture is displayed for an
over extended period of time
Remedy
1. Plug in the power cord.
2. Make sure the power switch is switched on.
3. Connect a signal connection to the display.
Move the display to another location to see if the
interference is reduced.
Make sure that the signal cable is attached
firmly to the back of the display.
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 display. Please verify
its specifications with this display's specification
section.
Use the Zoom mode or Custom zoom function
in the Screen menu to fine-tune display
geometry and time frequency parameter.
Make sure that both video inputs and sound
inputs are correctly connected.
1. Make sure that both video 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.
This display is manufactured using an extremely
high level of precision technology:
however, sometimes some pixels of the display may
not display. This is not a malfunction.
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
display. Refer to 4.2.5.CONFIGURATION 1
MENU for further details.