Troubleshooting of Network Interface Card

TROUBLESHOOTING OF N.I.C CARDS


1) N.I.C Not Sensing:


* First, check for the dust on the pin of the connector. If any, clean it to ensure proper contact of the tracks. (Or cleaning solution).
* If that does not solve the problem, check the crystal frequency. If it is not working, replace the crystal.
* If the crystal is O.K, check if the S.M.D or any components are dry soldered. If so, resolder the components.
* If that doesn’t work them replace the S.M.D. This will definitely solve the problem.

2) No Display If The Card Is Inserted:


* Just check for the shorting on the card, because display will not come if there is any shorting. If a shorting is found, try to correct it.
* If any component is shorted, try replacing the component. This will solve your problem.

3) N.I.C Not Connecting Through BNC As Well As UTP:


* Check for any dry soldering of the components on the card. If any, resolder the same.
* Check the transceivers on the card. If they are faulty, replace them with working ones.
* Check for shorting of the S.M.D. Correct it, if any.
* Touch up the S.M.D, in case it is dry- soldered.
Replace the main S.M.D.

N.I.C Not Connecting Through UTP Only:


In the case of the UTP, the path for the data is from the S.M.D to the transceiver & then to the cable.
Therefore, if the UTP is not working, the problem lies mainly with the transceiver. Try changing the transceiver.
If the Transceiver is O.K, try changing the delay line.

N.I.C Not Connecting Through BNC Only:


In the case of the BNC, the path for the data is from the S.M.D to the voltage converter, converter to the transceiver & then to the cable.
So, if the BNC is not working, check whether the converter is giving the proper output voltage. If it is faulty, replace it.
If the converter output is correct, then the transceiver could be faulty. Try changing the same.
If that does not help, the problem lies with the S.M.D alone. Replace it.