Pc-Check Windows Serial Quick Loopback Test Failure Information

Group Number 450X

Device Serial Ports

This is a group that tests Serial Ports. A serial port (typically designated COM) is a physical interface through which information transfers in or out one bit at a time according to the RS-232 standard. Tests are provided to verify the functionality of the serial ports as they transmit data, handle interrupts, and perform handshaking with external devices.

NOTE: Serial cards that have multiple serial ports must have the correct Windows® drivers loaded in order to be tested correctly.

Test Number 302

Quick Loop-back

This test performs an abbreviated loop-back test at a single baud rate, to test the port's ability to transmit and receive a short message.

Estimated Test Time 3s

ERRORCODES & TROUBLESHOOTING

The minimum and maximum baud rates are not valid CODE="0x00/3FF"

TROUBLESHOOTING0: The Minimum and Maximum baud rates may be the wrong way round. The Minimum and Maximum baud rates may be the same.

Unable to write the port configuration CODE="0x01/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

The serial port is a modem and cannot be tested CODE="0x02/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

Unable to transmit all the data CODE="0x03/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

Unable to receive all the data CODE="0x04/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

The transmitted and received data does not match CODE="0x05/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

Unable to read the port configuration CODE="0x06/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

The set and read configurations do not match CODE="0x07/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

Unable to transmit the Priority character CODE="0x08/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

TROUBLESHOOTING2: The Priority Transmit mechanism may be inoperative. Retest with motherboard group repeat tests if necessary.

Unable to receive the Priority character CODE="0x09/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.

TROUBLESHOOTING2: The Priority Transmit mechanism may be inoperative. Retest with motherboard group repeat tests if necessary.

Unable to find a serial port CODE="0x0A/3FF"

TROUBLESHOOTING1: The following are possible causes of errors: Faulty or wrong loop-back plug. Port to I/O interface (serial connector or interface chip) failure. Port does not support (all) status or flow control lines. Faulty port, device or serial chip (UART or chipset). Improper IRQ configuration. Test data rates exceed device capability.