Dahua DHL22 Manuale - Pagina 5
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7. Common troubleshooting
If problems are not included in the following symptoms described, please contact the manufacturer
for treatment.
Symptoms
1) The power indicator is not lit
2) Cannot realize plug and play
3) The image is dim
4) Image jitter or ripple
5) The power indicator is lit, however, the monitor
does not display any image
6) Lack of color (Red, green, blue)
7) The screen is not in the middle or its size is not
proper
8) The screen displays "The signal line is not
connected"
9) The screen displays "Input is not supported"
8. Product marking and explicit instructions
8.1 Product pollution control marking
Products manufactured by our company have adopted the following electronic and information
product pollution control markings:
8.2 Explicit instructions
Our company began to implement the requirements of the European Union's Restriction on
Hazardous Substances (RoHS) Directive in electronic and electric devices and all products in the future
will conform to the indicator requirements of relevant regulations.
Manual for the DHL22 (F600 series) LCD monitor
Troubleshooting
1. Turn on the power supply or not
2. Plug the power cord or not.
1. Whether the PC matches the plug-and-play.
2. Whether the display adapter matches the
plug-and-play.
3. Whether the 15-pin D-type signal line contact is
bent.
Adjust the brightness and contrast
There may be electric equipment around it causing
electronic interference.
1. Inspect whether the PC power is turned on.
2. Inspect whether the PC video card has been
inserted properly
3. Inspect whether the monitor signal line has been
connected to the PC properly.
4. Inspect the monitor signal line contact and
identify that pins are not bent.
5. Identify by pressing the Caps Lock key indicator
on the PC keyboard
Inspect the monitor signal line and identify that
pins are not bent.
Adjust the clock (CLOCK) and phase (PHASE) or
press and hold the hot key
1. Inspect whether the signal line is connected
correctly; if the contact gets loosened, please
fasten the screws to the contact.
2. Inspect whether the pin of the signal line contact
is damaged.
Your PC is set to an improper display mode,
please reset your PC to the display mode listed in
the table below.