All models
This section provides information pertinent to all 4820 models.
This table specifies the resolution by model number or touch technology type.
Condition description Resolution
The power indicator on the display is off
Models 42x and 4Fx only
Ensure that the 4820 is powered on by pressing the power button on
the display.
Models 42x, 4Fx, 46x, 10D, 1FR
EIA-232 only: Models 2xx, 5xx
1. Check the voltage of the power supply output (see “Testing the
power supply” on page 79.) If the voltage is incorrect:
a. Verify that the power cord is plugged into a working ac outlet.
b. Verify that the power cord is properly plugged into the power
brick.
c. If the voltage remains incorrect, replace the power supply.
2.
Verify that the power brick is properly plugged into the power port
of the display.
3. Replace the unit.
Models
48D, 48T
USB only: Models 2xx, 5xx
1. Check the voltage output of the powered USB cable (see “USB
power” on page 80).
v If the voltages are correct, replace the unit.
v If the voltages are incorrect, remove the cable from the system
unit, and verify that the voltage are correct at the system port.
v If the voltage at the port is not correct, the system unit requires
servicing.
2.
If the voltages are correct at the system unit port and wrong at the
cable, replace the cable.
3. Verify that the powered USB cable is properly connected to the
4820 SurePoint Solution.
4. Replace the unit.
Power LED amber All Models:
Low power mode. Communication is not yet established between host
and 4820
1. Check the video cable connections and replace the cables, if
necessary.
2. Verify that the host PC is powered on.
3. Check the standby or suspend mode of power management.
4. Replace the unit, if necessary.
Update November 2005
74 4820 Planning, Installation and Service Guide
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