Troubleshooting - Extron electronics VGA Distribution Amplifiers P/2 DA12 Series User Manual

Installation and Operation, cont'd

Troubleshooting

After input and display devices are connected to the distribution
amplifier and all units are powered up, the system is fully
operational. If any problems occur, ensure that the cables are
properly routed and connected. Some common problems and
diagnostic checks are shown below:
If the LED light on the front panel is not on, the distribution
amplifier is not receiving power. Ensure that the electric outlet
is functional and that the power cord is correctly connected (see
page 2-7).
If there is no image on the display device, check that there is
an input signal. If the LED light is amber, the power is on but
the distribution amplifier is not receiving an input signal. Verify
that the cables are correctly connected from the input device and
that the input device is switched on (see pages 2-9 and 2-10).
If the front LED is green but there is still no output signal:
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If the source is a laptop computer, which is providing an
unstable output image, ensure sync impedance switch number
1 (input sync) is in the ON position (see page 2-8).
If output 1 supports an image but other display devices do not,
ensure that the resolution capabilities of the display device on
output 1 does not exceed the resolution capabilities of output
devices on the other channels. For optimal performance, all
display devices should have similar resolution capabilities (see
page 2-9).
P/2 DA8 and P/2 DA12 • Installation and Operation
2-12
Check that the cables to the output device are connected
correctly (see pages 2-9 and 2-10).
Make sure that the output for that channel has not been
muted (see page 2-11).
Change the sync impedance of the output to 75 ohms on the
front panel (see page 2-8).