MacBook - Ethernet Jack Not Working

malibu3467 · malibu3467 #1 (**permalink**)

10-10-2009, 12:07 AM

I don't know if it is a coincidence that I recently upgraded to Snow Leopard, but my computer is not recognizing a connection when an ethernet cord is plugged in. I know the connection is valid because the internet company has checked the connection, and it is working fine with my AirPort Express... just not directly into my computer. Any advice??

chscag · chscag #2 (**permalink**)

10-10-2009, 12:48 AM

Try another ethernet cable and another ethernet jack if possible. Ethernet cable connectors are easily damaged so be sure to check both ends. Best to use a new cable as a test.

Regards.

malibu3467 · malibu3467 #3 (**permalink**)

10-10-2009, 01:45 AM

I have tried another cable, and other outlets and still have no connection; the Network Diagnostics say "cable is unplugged" even though the same cable connects to my AirPort

/

chscag · chscag #4 (**permalink**)

10-10-2009, 06:59 PM

That leaves either the ethernet input connector or the ethernet controller in your machine that may be defective. Go to Applications, Utilities, and open your System Profiler application. Click on "Ethernet Cards" and see if it lists both your Airport card and ethernet controller card.

If the ethernet controller card is listed, run the Apple Hardware Test using your install media. Here's a LINK to instructions on how to run the AHT.

The Apple Hardware Test is not exactly the best test for certain types of hardware failure, but it sometimes will pick up on an airport card or ethernet controller that's bad.

Regards.

manymanymacs · manymanymacs #5 (**permalink**)

10-10-2009, 07:30 PM

Ethernet pins tend to get dust and lint between them, causing disruptions in the connection. If you think this might be your problem, shell out 10 bucks for a can of compressed air.

malibu3467 · malibu3467 #6 (**permalink**)

10-11-2009, 11:34 AM

Thanks for all of the help! Looks like my Ethernet card is not in Utilities... what now?

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MacBook - Ethernet Jack Not Working

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malibu3467 #1 (permalink)
Member Since: Oct 09, 2009 Posts: 4	10-10-2009, 12:07 AM I don't know if it is a coincidence that I recently upgraded to Snow Leopard, but my computer is not recognizing a connection when an ethernet cord is plugged in. I know the connection is valid because the internet company has checked the connection, and it is working fine with my AirPort Express... just not directly into my computer. Any advice??
	QUOTE Thanks

chscag #2 (permalink)
Member Since: Jan 23, 2008 Location: Fort Worth, Texas Posts: 31,986 Mac Specs: 21.5" iMac 2.5 GHz i5, iPad 3rd Gen., 3 iPods	10-10-2009, 12:48 AM Try another ethernet cable and another ethernet jack if possible. Ethernet cable connectors are easily damaged so be sure to check both ends. Best to use a new cable as a test. Regards.
	QUOTE Thanks

chscag #4 (permalink)
Member Since: Jan 23, 2008 Location: Fort Worth, Texas Posts: 31,986 Mac Specs: 21.5" iMac 2.5 GHz i5, iPad 3rd Gen., 3 iPods	10-10-2009, 06:59 PM That leaves either the ethernet input connector or the ethernet controller in your machine that may be defective. Go to Applications, Utilities, and open your System Profiler application. Click on "Ethernet Cards" and see if it lists both your Airport card and ethernet controller card. If the ethernet controller card is listed, run the Apple Hardware Test using your install media. Here's a LINK to instructions on how to run the AHT. The Apple Hardware Test is not exactly the best test for certain types of hardware failure, but it sometimes will pick up on an airport card or ethernet controller that's bad. Regards.
	QUOTE Thanks

manymanymacs #5 (permalink)
Member Since: Sep 13, 2009 Posts: 65 Mac Specs: 2 GHz MacBook '07, 1.83 GHz Mac Mini '06, 700MHz Emac 2003, 400MHz Imac 2001	10-10-2009, 07:30 PM Ethernet pins tend to get dust and lint between them, causing disruptions in the connection. If you think this might be your problem, shell out 10 bucks for a can of compressed air.
	QUOTE Thanks

malibu3467 #6 (permalink)
Member Since: Oct 09, 2009 Posts: 4	10-11-2009, 11:34 AM Thanks for all of the help! Looks like my Ethernet card is not in Utilities... what now?
	QUOTE Thanks

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