You can use a live printer with the port for testing purposes however, thisaction elevates the possibility that the printer might inject a problem into thetroubleshooting process. Software diagnostic packages normally require you toplace a loopback plug in the parallel port connector to run tests on the port.The loopback plug simulates a printer device by redirecting output signals fromthe port into port input pins. Thisis not normally a problem because port failures generally do not affect the maincomponents of the system. Run a software diagnostic package to narrow the possible problem causes. If all configuration settings for the ports appearcorrect, assume that a hardware problem exists. If values for any of the physical ports installed in thesystem do not appear in this window, check for improper port configuration.īecause the system has not loaded an operating system at the time theconfiguration window appears, the operating system cannot be a source of portproblems at this time. If the system has not detected thepresence of the port hardware at this stage, none of the more advanced levelswill find it either. Readthe port assignments in the bootup window. If serial or parallel port problems are occurring, the CMOS configurationwindow displayed during the startup sequence is the first place to look. In both cases, the protocol must be setproperly for the port and the device to carry out communications. However, devices that use the port in a bidirectionalmanner need to be set to Enhanced Parallel Port (EPP) or Enhanced CapabilitiesPort (ECP) mode for proper operation. For example, a modern parallel port must be enabled and set to theproper protocol type to operate advanced peripherals.įor typical printer operations, the setting can normally be set to StandardParallel Port (SPP) mode. Occasionally, you must set up hexadecimaladdressing for the port addresses however, this is becoming rare as PnP systemsimprove. This normallyinvolves LPT, COM, and IRQ settings. Check the PC board that contains the I/O portcircuitry (and its user guide) for configuration information. With newer Pentium systems, you must check the advanced CMOS setup todetermine whether the port in question has been enabled and, if so, whether ithas been configured correctly. The input device does not work on the game port. The printer's Online light is on but no characters are printed whenprint jobs are sent to the printer.Īn 110x IBM-compatible error code displays on the monitor (serial porterror).Ī Device Not Found error message displays, or you have an unreliableconnection. Typical symptoms associated with serial, parallel, or game port failuresinclude the following:Ī 199, 432, or 90x IBM-compatible error code displays on the monitor(printer port). The software is not configured properly for the port (that is, theresource allocation, speed, or protocol settings do not match). Generally, there are only four possible causes fora problem with a device connected to an I/O port: Learn More Buy Troubleshooting Port Problemsįailures of the serial, parallel, and game ports tend to end with poor or nooperation of the peripheral. A+ Certification Exam Cram 2 PC Maintenance and Troubleshooting Field Guide
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |