NEC QX-S5500G Series - Hot Swappable Fan Tray Failure of QX-S5524 GT-4 X1 C, QX-S5548 GT-4 X1 C, or QX-S5524 GP-4 X1 C; Configuration Terminal Problems; No Terminal Display

Installation Guide
QX-S5500G Series Ethernet Switches
7. Maintenance and troubleshooting
7-5
7.2.2 Hot swappable fan tray failure of QX-S5524GT-4X1C, QX-S5548GT-4X1C,
or QX-S5524GP-4X1C
WARNING:
 If both fan trays fail during operation, replace them within 2 minutes while the switch is operating. Do not
make switch operate in the state which has no fan modules for more than 2 minutes.
 If one fan tray fails, perform either of the following tasks:
・If the ambient temperature is not higher than 27°C (80.6°F), replace the fan tray within 24 hours and make
sure the failed fan tray is in position before the replacement.
・
If the ambient temperature is higher than 27°C (80.6°F), replace the fan tray immediately.
The QX-S5524GT-4X1C, QX-S5548GT-4X1C, or QX-S5524GP-4X1C is supporting hot
swappable fan tray.
To replace a failed fan tray, see “Installing/removing a fan tray" of "Installing the switch”.
7.3 Configuration terminal problems
If the configuration environment setup is correct, the configuration terminal displays booting
information when the switch is powered on. If the setup is incorrect, the configuration
terminal displays nothing or garbled text.
7.3.1 No terminal display
I. Symptom
The configuration terminal displays nothing when the switch is powered on.
II. Solution
To resolve the problem:
1) Verify that the power module is supplying power to the switch.
2) Verify that the console cable is correctly connected.
3) Verify that the console cable does not have any problems and the terminal settings are
correct.