Is my ethernet port OK? How to test?

[lexvo]

My wired ethernet suddenly stopped working. I have connected my iMac with a cable to my Airport Extreme. Under Network-Ethernet it says "No connection" "cable not conected". I tried several things thusfar:
- mount a new ethernet (cat5e) cable
- reset NVRAM and PRAM
- reset my Airport Extreme
- powerdown and startup my entire network
- I tried a different port on my Airport Extreme

Nothing of this helps. Wifi is working though. And communication between my Airport Extreme and my NAS and modem is also working (both are wired).

So, is there a way to test if the ethernet-port on my iMac is OK? Or am I missing something?

 

[Zh2]

Hi,

Does this help?

Hard Drive > Applications > Utilities > Network Utility > Info' {Select Ethernet}

Regards.

Z.

 

[lexvo]

Hard Drive > Applications > Utilities > Network Utility > Info' {Select Ethernet}

Thanks for mention this, I had already forgotten about this tool.

The info for my ethernet says status inactive and no IP-adres. Statistics on the right are all zero.

 

[MDoby]

I had the same issue on one of my co-workers MBPs (2011) this morning. The fix was to shut the Mac down, disconnect all peripherals (including Ethernet), push and hold the power button for approximately 10 seconds. The power light should blink fast at this point. Release the power button and your Ethernet connection should work.

 

[lexvo]

I had the same issue on one of my co-workers MBPs (2011) this morning. The fix was to shut the Mac down, disconnect all peripherals (including Ethernet), push and hold the power button for approximately 10 seconds. The power light should blink fast at this point. Release the power button and your Ethernet connection should work.

Thanks for your reply. Alas, it doesn't work on my 2009 iMac. I think holding the power button for 10 secs is a way to do some kind of reset on a MBP.