Secure Router Manual
SG-5100
3.2.5 Troubleshooting
No Serial Output
If there is no output at all, check the following items:
• Ensure the cable is correctly attached and fully inserted
• Ensure the terminal program is using the correct port
• Ensure the terminal program is configured for the correct speed. The default BIOS speed is 115200, and many
other modern operating systems use that speed as well. Some older operating systems or custom configurations
may use slower speeds such as 9600 or 38400.
• Ensure the operating system is configured for the proper console (e.g.
ttyS1
in Linux). Consult the various
operating install guides on this site for further information.
Garbled Serial Output
If the serial output apears to be garbled, binary, or random characters check the following items:
• Ensure the terminal program is configured for the correct speed. (See “No Serial Output” above)
• Ensure the terminal program is configured for the proper character encoding, such as UTF-8 or Latin-1, depend-
ing on the operating system. (See the previous entry under “GNU screen”)
Serial Output Stops After the BIOS
If serial output is shown for the BIOS but stops afterward, check the following items:
• Ensure the terminal program is configured for the correct speed for the installed operating system. (See “No
Serial Output” above)
• Ensure the installed operating system is configured to activate the serial console.
• Ensure the installed operating system is configured for the proper console (e.g.
ttyS1
in Linux). Consult the
various operating install guides on this site for further information.
• If booting from a USB flash drive, ensure that the drive was written correctly and contains a bootable operating
system image.
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