Troubleshooting a serial input and output deviceRequisitoPasos1 Turn off the sistema and any peripheral devices connected to the serial port.2 Swap the serial interface cable with a known working cable, and turn on the sistema and the I/O serial device.If the problem is resolved, replace the interface cable with a known working cable.3 Turn off the sistema and the I/O serial device, and swap the serial device with a compatible device.4 Turn on the sistema and the I/O serial device.Paso siguienteIf the problem persists, see the Getting help section.Troubleshooting a NICPasos1 Run the appropriate diagnostic test. For more information, see the Using system diagnostics section for the available diagnostic tests.2 Restart the sistema and check for any system messages pertaining to the NIC controller.3 Check the appropriate indicator on the NIC connector:• If the link indicator does not glow, the cable connected might be disengaged.• If the activity indicator does not glow, the network driver files might be damaged or missing.Install or replace the drivers as necessary. For more information, see the NIC documentation.• Try another known good network cable.• If the problem persists, use another connector on the switch or hub.4 Ensure that the appropriate drivers are installed and the protocols are bound. For more information, see the NIC documentation.5 Enter System Setup and confirm that the NIC ports are enabled on the Integrated Devices screen.6 Ensure that all the NICs, hubs, and switches on the network are set to the same data transmission speed and duplex. For moreinformation, see the documentation for each network device.7 Ensure that all the NICs and switches on the network are set to the same data transmission speed and duplex. For more information,see the documentation for each network device.8 Ensure that all network cables are of the proper type and do not exceed the maximum length.Paso siguienteIf the problem persists, see the Getting help section.Troubleshooting a wet systemRequisitoPRECAUCIÓN: Many repairs may only be done by a certified service technician. You should only perform troubleshooting andsimple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team.Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat are shipped with your product.Pasos1 Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.2 Remove the system cover.3 Remove the following components (if installed) from the system:• Power supply unit(s)• Optical driveSolución de problemas del sistema 145
