HP Portable 486 Compaq Portable 486c Personal Computer Maintenance and Service - Page 33

1101 - 14 Serial Port Test; DRIVER/RECEIVER data failure 1101 - 15 Serial port test modem detection 1101 - 16 Serial port test, modem ROM checksum 1101 - 17 Serial port test, tone detection 1101 - 18 Serial port test, COM3 set to invalid interrupt 1101 - 19 Serial port test, COM4 set to invalid interrupt 1109 - 01 Clock register initialization failure 1109 - 02 Clock register rollover failure Error Recommended Code Description Action 1109 - 03 Clock reset failure Replace the I/O board and retest for error codes 1109 - 04 Input line or clock failure 1101 - xx through 1109 - xx. 1109 - 05 Address line fault 1109 - 06 Data line fault Table 3-9. Modem Test Error Codes Error Recommended Code Description Action 1201 - xx Modem Internal The following steps apply Loopback Test to error codes 1201 - xx through 1210 - xx: 1201 - 01 UART DLAB bit failure 1. Refer to modem documentation for 1201 - 02 Line input or UART Configuration utility failure procedures. 2. Check the modem line. 1201 - 03 Address line fault 3. Replace the modem and retest. 1201 - 04 Data line fault 1201 - 05 UART control signal failure 1201 - 06 UART THRE bit failure 1201 - 07 UART DATA READY bit failure