Ethernet port not connected

Hello,
Since a couple of hours, my Ethernet interface (through a Thunderbolt or USB connector) remains "not connected".
I couldn't find a clear answer to this problem ... Any idea ?

Try resetting the SMC and PRAM.
http://support.apple.com/kb/HT3964?viewlocale=en_US&locale=en_US
http://support.apple.com/kb/PH14222

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Ethernet port not connected - airport working - not able to get online

Hi, new poster. Never had an issue with our beloved iMac 20 inch Intel Core 2 Duo 2.16 GHz - 2GB 667 MHz DDR2 SDRAM. It's old but it serves us, we hope it's not shot. Power goes out a lot here, system has surge protection but no battery backup. System just goes down without being shutdown properly. We used wired Ethernet. No the problem. Last time power just went out, the system would not boot up. I searched around and found out to use the DVD to verify/repair disk. It finally did and system now boots up. However, it says the Ethernet is not connected. It is. I tried three different cables that worked with our laptop and two different routers, all that happens is the light on the router flashed on and off. While on the network status in sys pref displays no cable detected vs. Cable connected but not connected to internet. Assumed the port was shot. OK, turned on the airport. Connects, gets DHCP assigned IP address and/or accepts static IP but when we launch Safari says it can't connect. Tried Opera browser, same thing. Sophos AV also can't connect for updates. All these network configurations had worked previously until this last power outage. Searched for help, as I don't want to waste peoples time. Found out about these things that follow: SMC RESET - PRAM RESET - Delete connection and recreate same - Network Diagnostics - Hardware Diagnostics - Verify & Repair disk ••• Nothing makes it connect to Internet. Network diagnostics gets to end but will not get connected. Hardware diagnostics regular and extended report no issues. We think the logic board is shot given everything we tried and symptoms with system. Can anyone suggest something we did not try of the things we did listed above? Please help us save this thing from the recycling center. Thanks in advance. Sorry for the long post, wanted to be thorough with what's going on and what we have already tried and done thanks to searching these forums for the last week.

Yikes, sounds like big problems!
Have you blown the dust out lately?

Mountain Lion Mac Mini Server Ethernet Port Not Working

I have a Mac Mini Server and once I upgraded to Mountain Lion Server the Ethernet port is unresponsive. It worked before upgrading. Is there something with Mountain Lion Server that is causing the Ethernet port not to work properly?

Make a "Genius" appointment at an Apple Store.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.

"Ethernet Cable Not Connected" Huh?

I have a dual 10.3 450 G4 that I rarely connect to the internet. I kept getting the wrong date and time so I changed the battery. Now the monitor display keeps resetting to the wrong size and I keep getting the message the "Ethernet Cable not connected even though if I connect the cable to my laptop it works fine. I even tried restarting in OS 9, I repaired permissions still nothing. The system profiler tells me that the the extension is not loading. I can't find where to dump the preferences.
Any help?
Thanks
Enio

Hi,
Try re-setting the PRAM.
http://docs.info.apple.com/article.html?artnum=2238
or, PMU Reset
http://docs.info.apple.com/article.html?artnum=95037
Regards,
Dave

Dual Ethernet will not connect if set to share Single IP address

The subject says it all. My trusty old Dual Ethernet will not connect if set to share Single IP address.
I cannot get anything but a self assigned IP address with it set to share a single IP address.
Before about Tuesday of last week I had connected to it a Mac mini, iMac, Dell Desktop, Dell Laptop, and PS3 all working fine. I think Comcast or Apple updated their system or Airport software and now the old dual Ethernet will not share a single IP address.

So far as I know, there has been no recent change in Apple's software affecting the Snow (a/k/a Dual Ethernet) base station. About 2-1/2 weeks ago, Apple distributed an update to AirPort software for Intel Macs running Tiger, but it would not have affected the base station.
Your topic implies that when the Snow is not set to share a single IP address (i.e., presumably, when "Distribute IP addresses" is unchecked in the Network pane of AirPort Admin Utility for Graphite and Snow), one of the computers is connecting to the Internet through the base station. I also imagine that the self assigned IP address you mention is the IP address of that computer, rather than of the base station, and that that computer obtains an IP address from Comcast when the Snow is not distributing IP addresses.
Assuming that that computer is connecting wirelessly, then whatever settings that computer is using for TCP/IP and PPPoE in the AirPort part of System Preferences, while the computer connects to the Internet, should be the ones used for the base station, in the Internet pane of AirPort Admin Utility for Graphite and Snow. (Most likely, it is simply "Using DHCP.") The IP address obtained from Comcast should be received by the base station, when it is set to distribute IP addresses in the Network pane, and the IP address should show up in the Internet pane. (When the Snow is distributing IP addresses, it has two IP addresses itself, a WAN IP address obtained from Comcast and a LAN IP address, 10.0.1.1, visible only to devices in your network.)
Even when the settings are correct, the Snow might not be able to obtain an IP address if your cable modem remembers the computer, which had been receiving the IP address previously. You'll probably need to shut down the computers and unplug power to the base station and cable modem. After waiting 5 minutes, restore power to the modem, then after another 5 minutes, restore power to the base station, then after another 5 minutes, start up a computer.

We traded our home internet service for a Sprint Hot Spot. The hot spot does not have an ethernet port to connect through. Can we connect our time capsule to the wireless hot spot?

Hello, we switched our home internet service from an ethernet modem to a wireless hot spot.
Do you know if there is a way to connect our time capsule to the hot spot?
Everything I read only suggests connecting through an ethernet cable. I'm hoping there is a way to do this.
Any help would be appreciated!
Thanks!!!

No you can't join a wireless hotspot with a Time Capsule directly via it's 'join' option (tried and failed - well to be exact it kinda works but the Time Capsule's ethernet ports no longer work).
What you can do is buy an airport express and use it's 'join' option to connect to the iPhone's hotspot. Then you connect the airport express via ethernet to the time capsule (in bridge-mode).
You can then connect your computers to the time capsule via ethernet or use it's wireless function to set up wireless network (with a different name to that of the hotspot) that your wifi stuff can connect to.
Thingi

I can not use the Ethernet Port to connect another device. My Airport Express allowed me to do this.

I want to use the Ethernet Port for my Apply TV for another device (Direct TV box), but it doesn't work. I have Airport Express with an Ethernet port and I was able to plug my Direct TV box to download.

It's not designed to extend a network, and plugging in ethernet disables wi-fi in any case.
AC

Built-in ethernet port not working in unibody Mac Mini

Hi,
So ever since I acquired this new mac mini I haven't been able to get it to recognize any devices connected via ethernet. I obviously checked the cables and all is good there. I tried connecting it to another mac, and while the other machine was detecting a device (the mac mini) at the other end of the cable, the mac mini kept saying that the cable is unplugged or the device off.
After several days of having the issue I decided to remove the ethernet service from the network preference pane to set it up again but to my surprise, the built-in ethernet option was not available (I only got airport, firewire, bluetooth DUN, VPN, PPPoE and 6 to 4). At this point I tried removing the networkinterfaces.plist file form the system configuration folder in the system preferences folder to no avail. I then tried to zap the PRAM, NVRAM, reset the SMU, SMC and all that kind of things to get the port recognized by the system but no luck.
When I look at the system profile I get these weird results in Ethernet Cards:
pci14e4,4353:
Type: Other Network Controller
Bus: PCI
Vendor ID: 0x14e4
Device ID: 0x4353
Subsystem Vendor ID: 0x106b
Subsystem ID: 0x0093
Revision ID: 0x0001
Link Width: x1
BSD name: en0
Kext name: AppleAirPortBrcm43224.kext
Location: /System/Library/Extensions/IO80211Family.kext/Contents/PlugIns/AppleAirPortBrcm 43224.kext
Version: 425.16.2
Comparing it to other macs I have It should read "ethernet" rather than that strange pci name on top and the kext name shouldn't read airport but something like AppleIntel and in location it shouldn't direct to the IO80211Family.kext package but rather to the IONetworkingFamily.kext.
So I popped in the system install DVD and fired up System profiler and at that point I didn't even get an "ethernet cards" option in the left side pane. So this is leading me to believe that the hardware is not being recognized at all, so maybe it's damaged. I did replace the HDD with a bigger one and change the RAM modules to bigger ones but I don't think I could have damaged the hardware in these processes, also I don't see how this would affect the ethernet port as it's integrated to Motherboard and didn't messed with it at all (I was very careful, to say the least!).
The last thing to do is reinstalling the system but I don't think it'll help (after seeing that the ethernet port is not even being detected by the install OS) but I need to offload all the data from my internal disk and at the moment I don't have an spare drive to do it.
So, what's the recommendation? A field trip to an Apple Store? Closest one is like 3,000 km from where I am right now, so...
Well, thanks for any pointers, suggestions and help in general.

I do not have any answers for you. Yes it appears to be reading what should be an ethernet card as an AirPort card. Have you played around with trying to install another version of Mac OS X other than the version that shipped with the Mac mini? Apple has long told us that we should not install a version of Mac OS X that was older than the shipping version. With the Mid 2010 Mac mini, the Restore DVD has the only version of Snow Leopard that will work with this Mac mini's specific hardware. At least until Apple releases 10.6.5. If you have installed other versions of Mac OS X, then erasing the HDD and installing the OS from the Restore DVD(s) that shipped with the mini may get you back to the point you need to be.
Unfortunately I think that you voided your Apple Warranty when you installed the different HDD. That was always a question in the past when folks wanted to open the former version of Mac minis and upgrade the RAM. But with the 2009 models folks started reporting here in the Apple Discussions that Apple was informing them that they had voided their warranty by opening their Mac mini. This new model made the RAM user upgradable, but the User Manual specifically states on page 43, 54 and 61 that there are no user serviceable parts in the Mid 2010 Mac mini except the memory.
Dah•veed

HP 7210 All-In-One Ethernet Port not working

The green Ethernet port light is not lighting and the computer can no longer find the printer. I believe it may have been damaged by a power surge during a lightning storm. I have checked the Ethernet cable that connects it and it is working fine with my laptop so it is not the cable coming into the printer. The printer works fine with the USB cable and all other printing, faxing and copying functions are working fine. Is it possible to repair or replace the Ethernet port?
I have also tried setting the IP address back to default and manually setting the IP address. The port is just not recognizing the cable.

Jim B - First, thank you so much for helping me.
I was able to get the green port light to light-up by performing the steps 1 - 5 you recommended. Also the amber data light is on but not blinking. In fact now they both stay lit even when the cable is removed. When I use the same cable with my laptop the green light comes on and the amber light blinks.
Unforntunately, the printer is still not finding the IP address. I tried the function to "Restore the Network Defaults" and I also tried to manually set the IP Address. When I print the network settings it indicates the status is "Offline" and I have the following changes:
                                                                Was                                                                       ISActive Connection Type:               Wired                                                                    None
ULR: http://                                    192.168.1.102                                                     0.0.0.0
Hostname:                                       HP1B376F                                                           HP1B376F
IP Address:                                       92.168.1.102                                                      0.0.0.0
Subnet Mask:                                   255.255.255.0                                                    0.0.0.0
Default Gateway:                            192.168.1.1                                                         0.0.0.0
Configuration Source:                      DHCP                                                                  Not Specified
DNS Server:                                      68.230.242.25                                                     0.0.0.0
Link Configuration:                          100TX – Full                                                        None
mDNS:                                              Officejet 7200 series (47E2A6)                        Not Specified
Any ideas what I should try next?
Thanks
Connie

Use ethernet port to connect a pc

Hi
I am planning to use my raspberry pi to do a few projects, but it is not near the router (needs connection thought Ethernet - and before anyone asks im not able to use a wifi dongle to connect due to project requirements size wise ) but near my officejet 6700, can i use the Ethernet port on the printer to connect my raspberry pi to the network the printer is connected to. Do i need to fiddle with settings?
Can anyone help
Thanks in advance
Martin
This question was solved.
View Solution.

No you can not use the Ethernet port on the printer. This is only to connect the printer to a wired network.
Say thanks by clicking the Kudos Thumbs Up to the right in the post.
If my post resolved your problem, please mark it as an Accepted Solution ...
I worked for HP but now I'm retired!

HP K5400 Ethernet Port Not Active

I am trying to help a friend set up a printer on their network. When I plug in the ethernet port to their switch, the network connection light on the switch nor on the back of the printer shows up and obviously no traffic lights turn on either. Since it looks like it isn't connected, I tried changing to a known good ethernet cable and used a known good port on the switch with no luck either.
I printed the Network configuration page and it shows as I would expect: Network Status: Offline.
Is there some secret to turning on the ethernet jack I am missing or could I possibly have a bad port on the printer?
Thanks for any help!
This question was solved.
View Solution.

Hi @wx3guy,
Welcome to the HP Forums!
I understand that you cannot connect your HP Officejet Pro K5400 with an Ethernet cable to your router, running on Windows 8.1. I am happy to look into this connection issue for you!
I would recommend to go through this guide, 'Printer is offline' Message Displays on the Computer and the Printer Will Not Print: Windows 8. But most likely, if you have tried a known good Ethernet cable, and it still is not working, than the issue could be a hardware malfunction of the printer itself. You may have to resort to using a USB 2.0 printer cable directly from the printer to the computer instead.
Otherwise, If the guide does not help, I would suggest to please call our phone support at 800-474-6836 to get your printer serviced. If you live outside the US/Canada Region, please click the link below to get the support number for your region. Country-language selector.
Best of luck!
“Please click the Thumbs up icon below to thank me for responding.”
RnRMusicMan
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" to say “Thanks” for helping!

Thunderbolt Ethernet adapter not connecting on MacBook Pro Retina

I recently purchased the Thunderbolt to Ethernet Adapter to connect to my 13in MacBook Pro Retina Late 2012 (Mountain Lion 10.8.2) to a hardwired internet connection for faster downloads. However, when I connect the ethernet cord to the adapter nothing happens and only the wifi connection is identified.
Ethernet or Thunderbolt Ethernet are not an option in the System Preference > Network. Also, either connection are options when trying to add a network interface ( System Preferences > Network > + > Interface).
I have tried several fixes like Resetting PRAM or Removing Network Preferences File. The NetworkInferences.plist and Preferences.plist files did get recreated after reboot, but only the WIFI interface shows up.
http://tearfulwolfstudios.wordpress.com/2012/03/13/reset-network-preferences-osx /
http://rohanradio.com/blog/2012/02/27/fixing-thunderbolt-ethernet-on-the-macbook -pro/
I am sure the Thunderbolt ports are functional since I am able to connect my display using Mini DisplayPort to DVI Adapter
Could I have corrupted the Network Preference File or is could the Thunderbolt to Ethernet Adapter damaged?
Please help.

I had this problem, too, and an Apple Support call and Genius Bar visit later, I had the answer: if you're using Network Locations that preexist your Thunderbolt display, it doesn't seem to auto-add the possibility of "Display Ethernet" to your available network ports. To solve this, either:
Create a new Location in your Network system preferences. It will finally detect the "Display Ethernet" and use it. It'll slowly change from disconnected to No IP to green-is-for-go.
or
Fix an existing Location by clicking the + to add a port and choosing Display Ethernet. It'll slowly change from disconnected to No IP to green-is-for-go.

Ethernet: "Cable Not Connected" and Parallels?

Hi, everybody!
So, we've got a Late '06 iMac and we run Parallels to use Windows XP, since my wife's work stuff is not Mac-friendly. Our Ethernet port has not been waking from sleep properly for quite some time. The Network Pane just shows "Cable Not Connected." At first I thought it was my old router, but it's still happening with a three-month-old Time Capsule.
I took it to my local Genius Bar, and was told that this is a "known issue" with Parallels Desktop and Leopard. I uninstalled Parallels for the weekend and deleted its network devices from the pref. pane. The ethernet port worked for a couple of days, but then it was gone again last night.
Has anyone else run into this? Or heard about this "known issue?" I've not been able to find any information about it.
Thanks!
Jon

I'm seeing the same issue with Nov 2007 iMac. Parallels has never been installed on the machine. Has any progress been made in identifying a solution?

Ethernet ports not available

Is there a way to check the availability of the ethernet ports through the aiport utility app? All my wireless devices are working and having internet connectivity, but the only wired device that is connected to an ethernet port an the airport extreme in not connected to the internet. Any suggestions?

We're going to need a bit more info in order to help.
Please open AirPort Utility and click Manual Setup
Click the Wireless tab located below the row of icons
What is the setting that you see for Wireless Mode?

[solved] e1000e: Ethernet Port not seeing any carriers

Hi, I really don't know what to do anymore.
My ethernet port, who is named enp0s25 by systemd, doesn't work. After boot it is down, after setting it up by either ifconfig or "ip link", it shows the following:
~ ifconfig
enp0s25: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 64:31:50:94:20:0a txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xd4800000-d4820000
~ ip addr
4: enp0s25: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 64:31:50:94:20:0a brd ff:ff:ff:ff:ff:ff
Sometimes, the device is apparently sleeping, because
~ ethtool enp0s25
Settings for enp0s25:
Cannot get device settings: No such device
Cannot get wake-on-lan settings: No such device
Cannot get message level: No such device
Cannot get link status: No such device
But with "modprobe -r e1000e && modprobe e1000e" I can wake it up:
~ sudo ethtool enp0s25
Settings for enp0s25:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: Unknown!
Duplex: Unknown! (255)
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: no
This is what dmesg says during boot and trying to use the port:
~ dmesg | grep e1000e
[ 4.369636] e1000e: Intel(R) PRO/1000 Network Driver - 2.1.4-k
[ 4.369640] e1000e: Copyright(c) 1999 - 2012 Intel Corporation.
[ 4.378023] e1000e 0000:00:19.0: setting latency timer to 64
[ 4.378104] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 4.378139] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
[ 4.755103] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 64:31:50:94:20:0a
[ 4.755107] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
[ 4.755158] e1000e 0000:00:19.0 eth0: MAC: 10, PHY: 11, PBA No: FFFFFF-0FF
[ 142.346831] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
[ 142.449982] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
[ 379.944965] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
The device works perfectly with a recent arch live cd and also in windows. I nowhere can find any errors or warnings concerning this. What can I do?
Oli
PS: I tried several boot parameters I found on the internet related to pci stuff, nothing helped. The device did work a couple of days ago but I can't recall if some kernel update or anything else broke it.
Last edited by janoliver (2013-03-10 22:16:55)

Thanks a billion, I've got exactly this problem too. I had to reboot laptop every time when pluging and unpluging cable.
[ice@ice-thinker bin]$ ls /sys/class/net/ -l
total 0
lrwxrwxrwx 1 root root 0 May 8 20:10 enp0s25 -> ../../devices/pci0000:00/0000:00:19.0/net/enp0s25
lrwxrwxrwx 1 root root 0 May 8 19:55 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 May 8 19:55 wlp2s0 -> ../../devices/pci0000:00/0000:00:1c.4/0000:02:00.0/net/wlp2s0
echo on > /sys/bus/pci/devices/0000\:00\:19.0/power/control
this way can bring me network back.
reloading e1000e kernel module dose not work for me.
Last edited by shuaiming (2013-05-08 12:34:04)

Ethernet port not connected

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