Vivotek IP2121 - Manual (Page 69)

- 67 -
Appendix
A. Troubleshooting
Power-On-Self-Test
After the power has been turned on, Network Camera will perform a self-diagnostic to
detect any possible hardware defects. If the power indicator is dim at the beginning, the
system fails to proceed further without power. While the POST is proceeding, the status
LED indicators will keep blinking interchanged until finished or any fatal error happens.
If either status LED indicator is dim at the beginning, the LED may be broken.
Any possible fatal error has a special pattern shown in the following table. LED1 is the
one below power indicator and LED2 is the lowest one.
LED pattern after POST Failed function
Troubleshooting
LED2 and LED3 blink at
same time Video input The video decoder is broken. Ask
your reseller for technical service.
LED2 ON and LED3 OFF Ethernet network The PCI interface cannot work. Ask
your reseller for technical service.
LED2 OFF and LED3 ON Ethernet network The Ethernet controller is broken.
Ask your reseller for technical
service.
LED2 ON and LED3 ON Ethernet interface Ethernet interface failure includes
not only components on board but
also Ethernet cable and the
devices of the opposite end.
LED2 blink and LED3 ON System date and time The real-time clock is broken. Ask
your reseller for technical service.
LED2 ON and LED3 blink Camera control via COM or
modem interface The UART controller is broken. Ask
your reseller for technical service.
To reduce the system failure caused by operation error, always read the related
sections in this user’s manual to prevent from unexpected error caused by wild-guess
configuration.