### Running the Power On Self Test

Use this topic to run and interpret the power on self test (POST) for the PortServer TS 8/16.

#### Procedure: Running the POST Using the LEDs

1. Power on the PortServer TS 8/16.
2. Use the following table to interpret the output from the LEDs.

If ... | Then...
The power LED blinks immediately after POST | A DHCP error has occurred and the PortServer TS 8/16 was not assigned an IP address.
Any of the other four LEDs blink immediately after POST, | A hardware component failed.

#### Procedure: Running the POST from a Terminal

1. Connect a terminal to the first serial port on the PortServer 8/16.
2. If the port configuration was changed, configure the terminal to match the port settings. If the port is still using the default configuration, configure the terminal to use the following settings:

- VT-100 emulation
- 9600 baud
- 8-bit characters
- 1 stop bit
- No parity

3. Reboot the PortServer TS 8/16 and press v when the LEDs begin to blink.

POST output appears on the terminal screen.