IBM 4820, Справочное руководство системы

Страница: 101 / 124

Appendix B. Troubleshooting common problems
This section describes several common problems and explains what to do.
Note: Image problems can be 4694 system unit or SurePOS 700 Series system unit
problems, also.
Condition description Resolution
The power indicator on the display is off Models 42x, 4Fx, and 46x,
v
Check the voltage of the power supply output
(refer to the installation and Service manual).
If the voltage is correct, go to the next item. If
the DC voltage is not correct, verify that the
power cord is plugged into a working AC
outlet. Then, verify that the power cord is
properly plugged into the power brick. If the
voltage remains incorrect, replace the power
supply.
v
Check that the power brick is properly
plugged into the power port of the display.
v Replace unit.
Models 48D, 48T
v Check the voltage output of the powered USB
cable (see Table 11-3 on page 11-5). If the
voltages are correct, replace the unit. If the
voltages are incorrect, remove the cable from
the system unit, and verify that the voltage
are correct at the system port. The system
unit requires servicing if the voltage at the
port is not correct.
v If the voltages are correct at the system unit
port and wrong at the cable, replace the
cable.
v Check that the powered USB cable is
properly connected to the 4820 SurePoint
Solution.
v
Replace unit.
Power LED orange (amber)
v
Standby mode. Communication is not yet
established between host and 4820
v Check the cable connections and replace the
cables, if necessary.
v
Verify that the unit is powered on.
v Check the standby or suspend mode of
power management.
v
Replace the unit, if necessary.
Power LED green Operating mode.
© Copyright IBM Corp. 1999, 2003
B-1