Built in ethernet problem

I have a two week old MBP that I migrated all files from my previous PB G4. I use a wireless network at home and plug into a routed DSL ethernet network at work. The new MBP worked perfectly at my office (as did my PB G4 for years) until two days ago. Without having made any changes on MBP, the network connection could not be recognized.
This is the message diplayed in the network status window when I try to connect at my office:
Built in Ethernet is currently active. built in ethernet has a self assigned ip address and may not be able to connect to the internet
Other computers (mainly PC's) are all still running fine on the network). I did all the usually troubleshooting of wires, router and modem. I called Apple and went through the usual - reset PRAM, delete all network prefs and start from scratch with network setup - new location and all. No fix, so Apple tech told me to try to exchange it for a new one ("probably a hardware issue").
I took it back to CompUSA and the technician plugged into their ethernet, and all worked fine. They thought I was crazy.
Why would built in ethernet work initially on the office network, then quit working, but still work on other ethernet networks and wireless?
I found this previous post that seems to describe my exact problem and I see no real solution posted ---->
http://discussions.apple.com/thread.jspa?messageID=1921754&#1921754
Please help...

I radically re-installed my entire system back to factory fresh and the problem was fixed. After working great for two days, it happened again. Computer does not recognize that ethernet is plugged in. I'm beginning to think that the computer screws something up when it goes to sleep. Come to think of it, the problem has occured after waking from sleep while plugged in to my office ethernet. A possible work-around is to not allow the computer to sleep while plugged in to ethernet... I wish there was a fix. Maybe system 10.5 will be the answer.
KC

Similar Messages

Can't Use Built-in Ethernet-HELP!!!

I am trying to connect a slot loading 350 mhz imac to the internet through the built-in ethernet for a friend that needs it, but the network status pane (OSX.3 Panther) keeps saying the ethernet cable is not plugged in. I've tried several different Cat 5 ethernet cables and it still says this, so we can't connect to the isp (with cable modem). It also says the internal modem is not working, I get the red light next to it and the built-in ethernet buttons in Network status. I've tried direct connections to two different external cable modems, and three different ethernet cables, I think the problem is a software issue that needs correcting. I just got through with a clean install of OS 9.1 and OSX.3, but the network still does not recognize the ethernet cable as being plugged in.
Other things I've tried: zapping the PRAM, and resetting the nv-ram, but to no avail (as suggested by other posts I've come across). I ran Tech Tool 4 on it however,and the Network test PASSED.
Isn't there something I can do in Preferences or terminal so the network can see the built-in ethernet? I'd really appreciate any ideas or suggestions!
Thanks, Chuck

You can easily restore without updating to the latest OS - simply don't purchase it. You can restore from iTunes - on the Summary page, just click on Restore.
As to your WiFi problem (and that is what you most likely experiencing) tell us more about the network you are using, the hardware, who the heck your ISP is and so on. It may be as simple as whoever owns the network is blocking access to Apple sites.
I am assuming by built in sites, you are referring to the App Store, iTunes, etc. correct?
If your network indicates that you are logged in, tap Settings > WiFi. Does your network have a check mark next to it? If it does, tap the blue arrow (>) next to the name. Does your IP address start with 169.x or 192.x?

Built-In Ethernet Port Doesn't Show Up In The Network Preference Pane

My ethernet port no longer shows up in the Network preferences pane under Network Status. The status Airport and the Internal Modem are still displayed though. Plugging in an ethernet cable causes my machine to crash; sometimes I get a message that I need to hold down the power button to reboot, and other times command line-like text is displayed on top of whatever was on screen.
The only change I've made to my system since last using a wired connection was installing Security Update 2006-001 on March 1st and OS X Update 10.4.5 on February 14th. After running the 10.4.5 updater, my machine initially refused to reboot. On the first attempt, it played the start up chime, but the screen remained black. The second time, the Apple logo appeared, but the spinning pinwheel never did. The third attempt was successful and my system appeared to be functioning normally.
How do I get my ethernet port to work again?

Does "Built-in Ethernet" show up as a choice in the 'Show:" popup? If so, is it configured as you would expect? For instance, if "TCP/IP" is set to use DHCP, do you have an IP address, subnet mask, etc.? There is an "off" setting for TCP/IP; make sure that hasn't been selected somehow.
There is also an "Assist Me" button that will let you launch the diagnostics app. Does this also crash the Mac? If not, what are the results of its tests?
Also, you may want to do a permissions repair with Disk Utility if you haven't done this since applying the updates.
If you still get crashes, there may be a conflict with a log-in item, particularly if you have any third party ones. (Check that in the "Accounts" pref.) One way to diagnose things like that is by creating a new test account & logging into it. If the problems go away, you can assume a user cache, .plist, or login item is the problem.
If none of this turns up anything, you may need to reinstall the OS. Short of that, you can try downloading the 10.4.5 combo update & running it. It replaces more components than the "delta" update so it just might do the trick. Besides, if you end up having to reinstall the OS, having the combo version handy will save you the time of downloading & installing any incremental updates to get back to 10.4.5.
As always, backup all important files before applying any updates.
Good luck!

Built in Ethernet

Network assistant can't find my router. The led from the LAN on the router doesn't go on and I'm afraid the Ethernet card is not working anymore. Wireless is no problem.
I test the computer with the test software from apple and it gives no errors.
Maybe I overlook something, but for so far I know, the led should go on as soon you connect the cable.

Turn off the computer, router, and cable/DSL modem. Wait at least one minute. Remove the router and connect the cable/DSL modem directly to your computer's Ethernet port. Turn on the cable/DSL modem and wait for the status lights to indicate communication with your ISP. Then turn on the computer. Verify your Network preferences are properly configured for the Built-In Ethernet port and is set to use DHCP. If the computer pulls a valid IP address and you have internet access then your computer's Ethernet port is working fine.
Turn everything off again. Wait at least one minute. Re-connect the router. Turn on the cable/DSL modem and wait until the status lights indicate communication with your ISP. Turn on the router and wait until its status light indicates communication with the modem. If no communication is established then you know the router is bad. If there is communication then turn on the computer. If there's no communication between the router and computer then the router is bad.

Connection: ethernet problems and no modem?

Hi All-
I hope this isn't too stupid of a question but if it is feel free to inform me of that then berate my stupidity to you hearts desire
When I bought my new Macbook a few months ago I opted out of the built in modem. I thought foolishly that I would never need dial up again and I've been successfully using wireless since.
Fast forward to now and I'm in a foreign country (Kazakhstan) in an office that uses an ethernet connection through a router. I can't connect therefore I can't work! The diagnostics recognizes the ethernet connection but fails to connect. I hope I'm giving enough information here. It also asks for a router number which I can't find (this is a Windows office).
Is this happening because I don't have an internal modem? Or are the two things completely unrelated?
I have bought an external modem for use at home here using a dialup connection which works fine but it is only made for phone lines. Is there a device in existence that would allow me to plug in both phone lines and ethernet cables that would allow me to connect to the internet.
Thanks for reading - I hope at least some of you can make sense of my questions/ramblings!

That is good news that the problem isnt in the guts of my laptop. Sorry about the scant info. Here's the whole shebang:
When I connect the ethernet cable (proven to work on other computers) Network Status tells me that built in ethernet is currently active but that "built in ethernet has a self assigned IP address and may not be able to connect to the internet." So, I click Configure.
I get a choice between TCP/IP/PPoe/Appletalk/Proxies/Ethernet - i assume either the first or the last one. When I select TCP/IP I see the self assigned IP address. When I select ethernet it is set to configure automatically but it doesn't work.
So, I ask the assistant to help, select "connect to the internet through LAN" and I get 4 fields to fill in:
IP address: in which I put 192.168.0.x (x being a number from 15 up) - this is the series of addresses the rest of the office uses).
Subnet: I put in the usual 255.255.255.0
Router address: I have no idea nor does anyone else (its not required to connect on their Windows machines)
DNS: as per the other computers in the office I put in 194.226.128.1
I have a suspicion this is incorrect but I have no idea what it would be.
So, when I submit this information without the DNS section filled I simply get a message that I can't connect to the internet. When I submit the information including DNS I get this message:
"The IP address and router address are not consistent with the subnet mask you entered. Please check the following fields and enter valid values".
So, thats it. I would really appreciate any help on offer. Thanks.

Built in Ethernet not showing up

I'v got a 15inch Power book running 10.4.3 In my network settings the Built in Ethernet option is not showing up. I plug in a working ethernet cable (works fine with other powerbooks) and the computer can not detect a connection. Run network setup assistant and it can't make a connection.
Help.

This is my 5th post on my problem and I've received only one response--and that was just to tell me to post my question somewhere else. So here I am again.
When I go to Sys Preferences and Network. I pull up TCP/IP and there are no visible addresses. Network Status is all blank. What's the deal with my ethernet connection?
Anyone?
G4 iMac Flatscreen Mac OS X (10.4.4) 800 mHz / 768 RAM

Built in Ethernet not being recongnized

I have a Mac Pro Tower 2.66 version 1.1, 2006 model and the built in Ethernet in not being seen by the system. I have tried multiple things to get it to work but I'm about positive it's a logic board issue. I tried tons of tips, throwing away Network.plist files and others suggestions but still it's not showing up. I also put in a new ethernet card and it still wouldn't show up. I installed a new system on a clean drive and booted from it and it has the same issues so I don't see it being a preference. System profiler shows no ethernet at all on the computer.
So my issues aren't that I can't connect to the internet because I installed a Airport card after the issue started so I at least have access to my network. My problem is that the Mac App Store looks like it requires you to have a ethernet card which has a MAC Address built into the ethernet card and that is how it recognizes the computer. iTunes works fine because it must have some other identification method but I can't get the Mac App Store, iCloud or iTunes Match to work. It won't recognize my Apple id on the Mac App Store or iCloud, but iTunes recognize may Apple id and it works fine and it also works on all of my iDevices.
So here is the delema I can't update Apps that I bought on the Mac App Store, nor can I download new apps and some of the Apps I bought won't work because it can't identify my computer with the Apple id to show I purcased the App.
I have talked to tech support and all they do is tell me to scan the Apple Support Communities which I have and many web searches too. I have seen that this model Mac Pro must be prone to having issues with built in Ethernet failing, but I haven't found a work around to log into the App Store. So I am hoping someone knows a way to get around the Ethernet MAC Address issue, maybe trick the system into thinking it has a ethernet card or just a different way for the App Store to identify the computer.
Thanks for any help,

rkem, Welcome to the discussion area!
Not sure why you posted here in the iMac G4 discussion area.
Since your issue is with a MacBook, you should post in the appropriate MacBook discussion area.

Built-In Ethernet port configuration "grayed-out" in "Port Configurations"

Suddenly my "Built-In Ethernet" port configuration isn't clickable in Network Preferences' "Port Configurations" window. It's there but is "grayed-out" and the "On" clickbox won't take a checkmark.
Also, it's not showing up at all in the "Show" pull-down (since it's not clicked probably?).
My hub and modem are fine (i can connect to the internet with my wireless airport-laptop)except the "local network" indicator lamp on the hub where the ethernet cable is plugged doesn't light as it used to.
I recently had to delete some files so maybe that's why?
(Can't retrieve them, sorry! Maybe some names...)
Thanks much for any help!
here's the inf on my Desktop Mac which is running OS 10.4.9:
Machine Name: Power Mac G4
Machine Model: PowerMac3,6
CPU Type: PowerPC G4 (3.3)
Number Of CPUs: 2
CPU Speed: 1.42 GHz
L2 Cache (per CPU): 256 KB
L3 Cache (per CPU): 2 MB
Memory: 1 GB
Bus Speed: 167 MHz
Boot ROM Version: 4.6.0f1
PowerBook5,6 PowerPC G4 Mac OS X (10.4.9) PowerBook5,6 CPU Type PowerPC G4 (1.2)Number Of CPUs 1CPU Speed 1.67 GHz L2 Cache (per CPU) 512 KB M

well, what wonders an exercise break can bring!
I fixed the problem by looking on a backup disk for any files with the word "ethernet". I had done that on the local disk and didn't find anything of interest. But I did find these 4 files on the backup in a folder sitting directly on that external HD directory titled "System"inside of /library/extensions:
Apple_DEC21x4Ethernet.kext
AppleBCM5701Ethernet.kext
AppleBMacEthernet.kext
AppleGMACEthernet.kext
I copied them into my local HD's system/library/extensions EURIKA! the built-in ethernet has returned and I was immediately on line without any further adjustments.
The options that were missing as per my subject thread are all back.
Keep this one handy!!!
Thanks again for your help...I'm sure we'd have gotten there soon enough.
best,
Rob
PowerBook5,6 PowerPC G4 Mac OS X (10.3.9) PowerBook5,6 CPU Type PowerPC G4 (1.2)Number Of CPUs 1CPU Speed 1.67 GHz L2 Cach

Using Built in Ethernet

Although I seem to have come up with a solution regarding very slow file transfers by ethernet between this G4 and another, I'm once again having the same issue with this machine and another MDD. (both using 10.4.11)
I connect the two macs with an ethernet cable
On the machine I want to copy files to, I go to the Go Menu/Connect to...
I select the network volume, mount it and then drag the file to the hard drive...
It starts copying, but very slowly - 1 GB would take 2-3 hours !
I followed some online help and configured the Network so that Appletalk is on
I'm Using DHCP with IP address and subnet mask indicated in fields
Location is Automatic
In Sharing - Personal File Sharing is on and checked (when restarting, the Internet tab Share your connection from: pop up selection reverts to AirPort)
In Internet - Share connection from Built In Ethernet is selected.
For what it's worth, Built-in Ethernet status under Network Status has a yellow button, not green, like AirPort. Shouldn't it be green? how?
I'm totally in the dark - why can't Apple make this simpler?
Any help very much appreciated...

No, it just gets worse - I tried to follow that - as well as the support doc advice - then I get a pull down in Network saying changes have been made by another application - keeps doing that until I have to quit Sys. prefs. Going to the Sharing and the Internet tab, I select share your connection from airport, and it stops doing it...but I'm still getting snailpace file exchange . Am I the only Mac user on the planet with this problem - feels like it...am now spending 3 or 4th hour trying to solve...going around in circles?
BD: I made a New Location, as directed...and on both computers, too...changing configurations is scary because I didn't write down what I had before...and everything could get mixed up now. 11 years with Macs and I still have what seem like Problems 101.
Internet Sharing is off.
Don't know what 100 BaseTX or Gige - or where to find out.
Seems as if my only recourse is to dump files to an external hd and reload into 2nd computer...drat! Don't want to have to rely on that alone - or target disc mode...
After I tried to set a new location it didn't seem to get me anywhere - so I set Location to Automatic - since the KB article said that would automatically find the right path to built-in ethernet (I think, though I'm probably misunderstanding) Also, I getting into that downward spiral where everything seems to get increasingly hopeless...not rational, but real nonetheless. Any help appreciated, though you've given me a lot of your time and patience already...
Oh, another thing - I tried reversing the situation - attempting to access files from the one I tried to get files to at first - to the one I was trying to get files from - I'm able to connect, but it won't open up - only spinning ball and 'connecting' box...and then after 5 mns, it disconnects. Problem there too now...see what I mean?
Would it help if I listed what settings are presently on both computers? Then perhaps you could advise as to what needs to be reset....thanks

Tiger DHCP/Ethernet Problem :(

I'm staying in a hotel which offers free (ethernet based) broadband. The connection works througha D-Link 502-G dsl modem, and is routed through a Linksys router. All the other computers onthe network (iMac, iBooks) work fine. All are running Panther (10.3.0). I am using a G4 Powerbook running Tiger (10.4.3), but cannot get a DHCP address. Every time, the Mac self-assigns a local IP address (169.254.x.y). I have used several different cables, restarted teh Linksys Router to no avail. disabled PPoE, turned firewall off tried manually entering an IP address, subnet mask and router address...
Nothing! And yet when I plug the iBook (not mine) running 10.3 back in, it immediately gets a DHCP address in teh 10.1.x.y range and works perfectly.
This is the first time I've had problems with any hard-wired (or wireless network) adn I'm now at a loss. Any ideas anyone?
Thanks

Try this:
Remove the Ethernet cable from the computer. Open
Network preferences and select Airport then click on
the Configure button. Click on the built-in Ethernet
tab. Click on the TCP/IP tab. Set the Configure
IPv4 to Manually and click on the Apply button. Then
reset Configure IPv4 to DHCP and click on the Apply
button. Nothing should be set for PPoE. AppleTalk
should be OFF and no proxies configured. Quit
Network and shut down the computer. Assuming the
local router/gateway is configured and working
connect the Ethernet cable from the router/gateway to
the computer. Now turn on the computer. See if you
now get a proper IP address.
If you continue having problems try the following as
well:
1. In Network preferences turn off IPv6 (click on the
IPv6 button in the TCP/IP panel and select Off from
the drop down menu.)
2. Trash the
/Home/Library/Preferences/com.apple.systempreferences.
plist file and the
/Library/Preferences/SystemConfiguration/ folder.
Restart and reconfigure Network preferences.
Thanks for this... unfortunately neither has worked. Resetting TCP/IP IPv4 to Manually and back to DHCP and restarting gives me teh same local IP address (169.254.x.y)
Turning off IPv6 and trashing the files/folder you suggested, I get no DHCP address (not even a self-assigned address), System did not create a new SystemConfiguartion folder, so I as forced to restore it (having kept a copy) - I'm now back to where I started.
I did think for a moment that my Ethernet port was dead, but I can ping and access 10.1.1.1 (which is the d-Link DSL modem) so it can't be that
Anyone any otehr ideas?

Built in ethernet not working on some networks

Ok i have read everything there is to read, that i can find, i have asked a mac specialist, and after all of this i am still baffled. I have been connecting to the internet from the vary first day that i received my mbp, via wireless and ethernet. There have been no problems until i go to work and try to connect through the built in ethernet.
I have received three different status messages when i try and play with the settings, one says
The cable for built in ethernet is connected, but your computer does not have an ip address and cannot connect to the internet.
Built in Ethernet is currently active. built in ethernet has a self assigned ip address and may not be able to connect to the internet
built-in ethernet is currently active and has the ip address
well with all of these messages my internet doesnt work.
I then go home plug in my cable there and it works fine.
Why cant life be easy...please help i am at my wits end

I have this same problem (and error messages) using the wired ethernet at work with my MBP. I turn off to travel to work, connect sucessfully to ethernet but when the MBP sleeps I loose the IP address. I have to go into Network preferences and switch from "automatic" to another location and then back to "automatic" to get the network IP address to re-populate. This did not occur when I first got the MBP, but started a few weeks later. I used powerbook G4 on this network with no issues for over a year. Never have an issue using wireless. I think I have used wired connection in a hotel without issues. Could it be something related to this network?
MacBook Pro Mac OS X (10.4.7)
Power Book G4 17 Mac OS X (10.3.8)

Network/ethernet problems

Hi. Constant problem, every single time I turn on my computer it has no internet, but then I click on 'network' in the system prefs and a window jumps out to say "new port detected.....Built in ethernet" every single time! Click ok and then it finds the connection and we're cooking. But what can I do to fix this?
Now to my knowledge I've not altered any settings, my internet (direct plugged in cable through set top box) has always worked fine and this problem just started up about a month ago. Is there any other info needed for someone to answer? Thanks a million in advance.
Dan

You may want to consider booting the installation CD, starting 'Disk Utility' and doing a 'Repair Permissions'.
After that, reboot into Safe Boot, http://docs.info.apple.com/article.html?artnum=107393.
Then reboot again and see if it starts behaving (you may need to go through network config one more time to know for sure).
Wondering if a preference file isn't getting written due to a permissions issue.

Pls post here your update on ethernet problem with you imac

no connection anymore to DSL modem .. PPPoE host not available ... but it is
this is my update :
have chatted with the apple chat expert... after telling him the whole story he made some suggestions, which I have already tried ( like use another cable , etc. SMC reset )
He said, I have to bring my imac back to an authorised apple store ... hm ... arghhhh.
So I have the choice .. waiting and hope it is a software problem which will be solved by an update ... or giving back my imac and don't know what will happen with it...because up to now I haven't read any solution or proposal from Apple.
What would you do ?
Oliver

no connection anymore to DSL modem .. PPPoE host not
available ... but it is
this is my update :
have chatted with the apple chat expert... after
telling him the whole story he made some suggestions,
which I have already tried ( like use another cable ,
etc. SMC reset )
He said, I have to bring my imac back to an
authorised apple store ... hm ... arghhhh.
So I have the choice .. waiting and hope it is a
software problem which will be solved by an update
... or giving back my imac and don't know what will
happen with it...because up to now I haven't read any
solution or proposal from Apple.
What would you do ?
Oliver
Try this:
System preferences -> network
change show menu to Network Port Configurations
highlight built-in ethernet, click delete on the right side
confirm the removal
it will recreate the built-in ethernet port unchecked and probably at the bottom of the list
check the check box and move built-in ethernet to the top of the list
change Show: to built-in ethernet, click the PPP0E tab, check "connect using PPPoE" and enter your DSL information
click "PPPoE options" button and make sure you check "connect automatically when needed"
click apply now
power cycle your DSL modem
launch Safari and see if your connection is back
if that doesn't work go to Applications -> Utilities -> Network Utility
click the ping tab and ping your ethernet port (127.0.0.1) 10 times.
If it can't ping or returns packet loss, you'll more than likely want to take it in for service. You can run the Apple Hardware Test (on install disk 1) to confirm hardware issues.

Question about built-in Ethernet

OK...so I live in Miami, and have a cable modem, using Atlantic Broadband as my provider. I've had it plugged into an Airport Express.
I first got the cable modem about a month ago, and all was fine for a couple of weeks. Then, about 2 weeks ago, the cable modem stopped working. I tried plugging it directly into my MacBook, and under Network settings in System Preferences, it showed that it was plugged in and that the connection was active...but it wasn't. So, I called the company and had them come out to look at it. They replaced the cable modem. But after he replaced it, we tried plugging it into the MacBook, and the computer didn't even detect the cable modem. We then plugged it into the Airport Express, and it was recognized, but the connection was s......l..........o..............w. LIke...worse than dial-up, if that's possible.
The technician couldn't figure out why it wasn't working, because according to his equipment, the signal was fine. So he basically told me that it might be a problem with Apple's hardware, and then he left. ***?!
So, I've been playing with it the last few days...the connection using Airport Express is still deadly slow...and just now I tried plugging the cable modem back into the MacBook, and now it recognizes the modem, but under Network Status, the status next to Built-In Ethernet is just very very rapidly (like, a few times a second) switching between "The cable for built-in ethernet is not plugged in" and "The Cable for Built-In Ethernet is connected, but your computer does not have an IP address and cannot connect to the internet."
Needless to say, I'm a bit frustrated. I don't think there is, but is there any possible way that this is an Apple settings problem? I don't think so, because I've never had to adjust any settings with other cable modems I've had. Has anybody else ever experienced this?

Well the purpose of RE1000 is to increase the range of the wireless signal coming from the existing Access Point or router. The RE1000 Range extender can be used as a bridge with the second router..
But creating another wireless network will not be possible.. Most importantly, remember that in order to get the best performance from an RE1000 you need to place the extender in an area where you still have at least 50% signal strength to your router when you place it in the final location where the RE1000 will be used. To configure the RE1000 you will need to login to the UI after you have put the RE1000 in the final location to verify the signal strength below is a reminder about signal bars and what they mean as a reminder

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

Built in ethernet problem

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