Illegible Characters Display On The Terminal After Power-On; Repeated Reboot; Troubleshooting Sics And Mims - 3Com 3C13755-US - Router 5642 Installation Manual

86 C 7: T
HAPTER ROUBLESHOOTING
Illegible Characters
Display on the
Terminal after
Power-On

Repeated Reboot

Troubleshooting SICs
and MIMs
If the system operates normally after the system runs the POST, the start-up
information is displayed on the console terminal. If the configuration system has a
fault, the terminal may display only illegible characters.
If the console terminal displays illegible characters after the POST, verify that the
HyperTerminal parameters are set properly, as follows:
Baud — 9600
Data bits — 8
Stop bit — 1
Parity — None
Flow control — None
Terminal emulation — VT100
If the parameter settings do not match these values, reconfigure them.
There are two possible situations in which the system reboots repeatedly:
After
Now testing memory...
After
System now is starting...
displays,
Copied program error
Repeated reboots are caused by damage to the SDRAM. You can check whether
the SDRAM has a fault by checking the LED status of the router. During the POST,
the SLOT0 – SLOT2 LEDs and SERIAL0 LED light first. If the SLOT0 and SLOT1 LEDs
are on instead, the SDRAM test has failed.
If the SDRAM is damaged, you must replace it. See "Replacing the SDRAM" on
page 82.
The LEDs on the Router 5000 Family routers indicate whether the modules are
properly installed. After the installation of a module, turn on the power and check
the corresponding LED on front panel of the router. If the LEDs are on, the POST
was successful and the router is working normally. If the LEDs are off, the POST
has failed. You can test it using the following steps:
Check that the port cable matches the port.
Verify that the module is in normal operation by observing its LEDs .
Use the display command to check whether the module or interface module
has accepted the configuration.
All LEDs of the Encryption Accelerator MIM Remain off after Startup
After startup, all LEDs should blink once. If all indictors are off, the module or
hardware on the module has not powered on. Check whether the power of the
integrated equipment is properly connected.
If the power of the integrated equipment is in normal operation, the fuse of the
module may have burnt out or the Complex Programmable Logic Device (CPLD)
displays
displays, the system restarts repeatedly and
.