IBM xSeries 380, Hardware Maintenance Manual

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Diagnostics
55
USB test error codes
For the USB test error codes, see “USB test error codes” on page 244.
Miscellaneous diagnostics
The Miscellaneous Diagnostics include:
Serial port test
The Serial Port test makes certain that all the serial ports in the computer are
functioning properly.
AMIDiag can test up to four serial ports (COM 1 Through COM 4). All the
parameters, including parity, number of data/stop bits, can be selected for each serial
port.
The test routines check all COM port controller at speeds from 300 to 115,200 bps (up
to 460,800 bps if a 16550 UART is installed). Select the number of data bits, number of
stop bits, and parity type for each serial port. Set the parameters for the ports to be
tested. Highlight a field using the - and ¯ keys and set the parameters. Select Continue
and press <Enter>.
Serial port hardware test
The serial port tests includes:
• Serial Port Hardware Test
• Internal Loopback Test
• External LoopBack Test
• FIFO Test
• Baud Rate Test
Internal loopback test
This test verifies the proper functionality of the transmitter and receiver register in the
serial port using the internal loopback mechanism.