Is my Ethernet port fried?

In the last couple of days I've noticed that I can no longer talk to either of my two DSL routers using a cable and DHCP. Every time I connect either of them to my iMac G5, Network prefs tells me that a self-assigned IP is in use and that I may not be able to connect, which is indeed the case. However, I can connect either router to my Airport Express and then wirelessly connect from my iMac, so DHCP is certainly working, as I can verify if I look at the router's configuration pages in this setup.
So, does this mean the Ethernet port in my iMac has gone belly-up in some way? Is there any way to reset the Ethernet hardware and get it to talk to the routers again?
Thanks.
Message was edited by: RichardLim

UPDATE: Networking has returned to normal! But the way it happened is, to my mind, pretty unbelievable.
I said in my previous post I was just heading out. I was getting to ready to leave, and the computer had gone to sleep. But then, just like it's been doing in the last couple of days and occasionally in previous weeks, I heard the computer's fan suddenly start up and go absolutely crazy, like the iMac was burning up. As usual, there was no option but to do a hard shutdown as the computer will not wake from sleep when this happens. Restarted the computer and, after the 5-minute blue screen, logged in here to read up on what could have caused this sleep issue. Decided to reset the SMU and lo and behold, after I did that, the startup delay disappeared and when I connected my router by wire to the computer, the iMac immediately picked up a correct IP address via DHCP!
So, somehow resetting the SMU has cured all the problems I've been having for the last 48 hours. I'm frustrated but now happy as well.
Message was edited by: RichardLim

Similar Messages

Ethernet port fried by lightning strike?

My phone line and home was struck by lightning this weekend. All of the DSL filters in my home were fried and blown open simultaneously, the DSL modem was fried, and even with a new modem, I cannot connect. Is there any way (without taking it in) to test the ethernet port itself? Is there some sort of internal diagnostic that can detect a faulty port? The computer works fine otherwise. IF the port is dead, is it better to buy a new computer? (My insurance is covering all damages), or is the cost to repair something like this minor? I have read about using an airport as a go-around, but I'd rather fix the problem, not patch it. ANY and all info will be helpful. Thanks.

caparsons wrote:
My phone line and home was struck by lightning this weekend. All of the DSL filters in my home were fried and blown open simultaneously, the DSL modem was fried, and even with a new modem, I cannot connect. Is there any way (without taking it in) to test the ethernet port itself? Is there some sort of internal diagnostic that can detect a faulty port? The computer works fine otherwise. IF the port is dead, is it better to buy a new computer? (My insurance is covering all damages), or is the cost to repair something like this minor? I have read about using an airport as a go-around, but I'd rather fix the problem, not patch it. ANY and all info will be helpful. Thanks.
If the Ethernet port on an iMac is fried, you can replace that port only by _replacing the entire motherboard_. Depending on the kind of motherboard, the price could be several hundred dollars. It might be more cost-effective to get a new computer.

Lighting fried my Ethernet port

A Lightning strike fried my Router and Ethernet Port.
I've bought and new asdl router and this works with my laptop.
I've done a hardware test on my desktop g4 and everything appears fine. Using both the 'System Profile' and 'Hardware Test' the ethernet hardware is visible i.e. it tells me I have "built-in ethernet" and that nothing is awry. Connecting the g4 to the router with a new cable no light turns on indicating that a conection is made and the network preferences on the g4 state "The cable for Built-in Ethernet is not plugged in."
Has anybody replaced the physical port for their built in ethernet?
Or do I just buy myself an Scsi ethernet card and plug this in?
Are there any command line tools for diagnosing the status of the ehternet port with more detail than "the cable isn't plugged in'?
cheers, ewan.
dual 1.42ghz g4 desktop powerpc Mac OS X (10.4.6)
Mac OS X (10.4.6)

Many UPS models have an RJ-45 that you want to use for wired connections between the modem and router/switch. Even if you have a surge protector on your phone line before it gets to the modem (and you should) it still lets through more than is safe.
Just add a PCI ethernet card. Take a look on www.xlr8yourmac.com
or www.macwireless.com has them also.

Fried Ethernet port?

My Late 2012 Imac (13,2) was brutally attacked by a power surge during a recent thunderstorm;
it fried every connected ethernet port on my network (ie: modem, router, TV, AppleTV, TV receiver) and the ethernet port on my imac. Once i had the modem and router replaced; i find my ethernet port on my imac is dead; it still shows up in system profiler but no connection can be established;
of course i was a nitwit and didn't extend the coverage of my applecare, but i am wondering what steps i can take to get it back online, or if i need to take the imac in for repair.
and if i need to get it repaired, how much it would cost to have what i assume would be the logic board replaced?
any suggestions would be a great help!
In the mean time, i can still get online with my wireless card and gently weep for the loss of my damaged port.

AppleCare would not have fixed it any cheaper than without. They only fix manufacturer defects. The only foolproof way to prevent issues with lightning on a computer is to unplug it during a storm. You can bring it in for repair, but it is unlikely to be cheap. If your hard drive is still useable, get it removed and install it in an external hard drive case. You'd be better off replacing the machine with a comparable machine used or refurbished*:
http://www.macmaps.com/usedrefurbished.html
Unless you are certain that all your applications and drivers are 10.9 compatible:
http://www.roaringapps.com/
OS X: Printer and scanner software available for download have 10.9 compatible updates from these vendors:
HP, Ricoh, Canon, Epson, Brother,Lexmark, Samsung, and Fuji/Xerox
OS X Mavericks: Supported digital camera RAW formats
In which case, you can get a new Mac which would have 10.9 prebundled. Any Mac from
late 2013 on would have 10.9 prebundled and can't have 10.8 installed.
* Links to my pages may give me compensation.

Can't login to Mac App store on mac mini. Is it because my ethernet port is fried?

Hi
like many others, I am unable to log in to the mac app store on my mac mini. I get the error message saying "An unknown error has occured". I believe the ethernet port is damaged after an electrical storm, but I can still get online wirelessly. I've read on these forums that the app store verifys the account using the ethernet port. Can anybody confirm if this is the case, is there a workaround that anyone knows of?
I can log into the App store on my laptop fine, just not the mac mini.
Thanks in advance
Paul

This is happening on 2 of my machines. One is OSX Lion, the other OSX Mountain Lion. My personal rig works just fine - all on the same network, all with the same basic configuration. All can log in and out of iTunes, but the two servers can't login via Appstore. My rig and one of the servers even use the same Ethernet driver, so it's not that.
I would seriously doubt your Ethernet card would be working at all if it was indeed damaged by the lightning. The transducers are relatively sensitive, and it would either fry or not. You won't get "intermittent" operation as you have described. Here is a list of all the things I've tried (based on a number of forum suggestions), none of which has worked:
1) Sign out of itunes, sign back in, try to sign in to AppStore.
2) Re-enter information in your account info and save it again (knew that wasn't it but tried anyway).
3) Ran AppStore as root.
4) Using EFIStudio, I got the hex string ID of my ethernet card and specifically reference "device-properties" in the boot.plist. Others have said this works, so you might give it a try -
http://legacy.tonymacx86.com/viewtopic.php?f=169&t=28477
5) Deleted all other ethernet devices to avoid "confusion" of the return.
6) Verified I can get HTTPS returned from NAT device.
7) Used Wireshark to get a packet capture of it working on mine and not working on the other. On the one that doesn't work, all I get is a couple of SYNs to the appstore and then nothing. It was along these lines that I was hoping the "device-properties" would work.
I just thought of something though. If I don't see that ACK at all, it might be sending the packets somewhere else. hmmm. I'm going to hard-code in all HTTPS to be routed to that box and try it just for S&G.
Good luck!

Running 10.6.8 on mac mini. ethernet port quick. I can not print using wireless

Can not print using wireless. It printed fine using ethernet
Running 10.6.8 on mac mini. Ethernet port has quit. (lighting strike I think, it fried two routers, did not get anything else)

Nothing to go on here.
Do you have a wifi capable printer? If so, what model? What happens when you try to set it up?

My ethernet port is not working

I recently had my macbook sent into the store to repair a bad logic board (fried in a thunderstorm) and over the past month I have noticed that my ethernet port wasn't working. Before the storms our router was acting up so I figured our maintenance was working. When I noticed the bandwidth slowing I checked my ethernet connection only to find I have been using wireless this whole time.
Now I'm not sure if the apple store technicians (it was actually shipped off site to be repaired) checked the ethernet port when I last sent it in because from my knowledge it was working before the storm and I had never checked it afterwards.. I really don't want to be charged another $200 to fix a problem that could have been fixed during the same time as my previous work order.
I also had a bad experience with their timely service, my macbook was there for about a week and a half with no progress on anything when it was supposed to be shipped off site and when it finally was shipped off site it took a matter of two days to be fixed. That would have been two weeks less than my month turn over for this repair.
Any help or suggestions on what I should do and how I should approach the apple store? I really do not want a repeat and cannot afford to turn my macbook taken from me as it is being used for my current job.
P.S. I have singled the ethernet port to my computer as I had used my dad's macbook on the same ethernet cord and his worked, mine did not.

I have updated my computer this morning, it didn't change anything regarding the ethernet port. I also logged onto my windows through bootcamp and ran ipconfig. When I look into the ethernet option it says "media disconnected" could this mean the port is simply loose? or would there be a different sentence there if it was actually damaged. When I went under profiler though it did not say no ethernet ports are found but just listed off the usual numbers.
I'm tempted to reset my SMC but I want to make sure it will have no side effects on my computer, I really hope I can talk to the apple store because I'm really sick of their service to me.
I'm going to ramble for a bit but I feel like I got taken advantage of because I cannot be pushy or rude to others even in inconvenience. It was ~$100 for the repair service which isn't terrible and ~$130 for a new logic board togehter I ended up paying just under $300 for the complete repair which on it's own is not horrible either. However my computer was stuck in their system for a little over a month, it took 1 week to get the diagnosis which from there it should have been shipped off site to be repaired (and if followed how much time it took later on I would have been two days until I had my computer back) however every time I checked the status and called in the genius' replied it has been shipped off site so the status will not update until a repair has been finished. after a week of bombarding people at the apple store with phone calls asking how my computer is doing I finally got a call saying "it has been a week since we have heard from you about your computer, would you like for it to be repaired?". This was unbelievable all of my phone calls did not go through (was around 20 or so multiple ones in a day) and I wasted a week just to find my computer was basically lost in their store. Finally it was shipped off and repaired and sent back to me. When I brought this up to the manager in store she simply stated that there was no confirmation to repair the computer until I answered that phone call over a week later, which is absolutely ridiculous.
I received no other help from that point and ended up paying the full bill (which wasn't my purpose but still..) and I refuse to be treated like that again when it was supposed to be a somewhat simple procedure.
end rant.
Anyway, I really hope this works because I do not feel like repeating this event nor paying another ~100 service fee for something that could have been repaired during the same time.

Can a power surge damage the ethernet port?

My internet was working fine, then a storm came in and the lights flickered. Since then my ethernet port says there is no connection even though there is. I have replaced the router and checked the connection and cable on another computer and they work fine, but the imac no longer recognizes my cable plugged into the port, it just says nothing is connected. I have a surge protector on my imac but not on my router, is it possible a charge could have traveled up the line and fried the port?
I can't find any other reason to explain why it stopped working. Does anyone have any tips on getting the ethernet back up and running?
thanks

Yes, that can easily happen if the equipment is not protected in any way.

WAN port inop and PM ethernet port inop - options to connect to AEBS?

Hi. We had a thunderestorm last week at home and we shut everything down and unplugged the power cords, but I think the cable to the cable modem fried some of my ports. I have a cable modem hooked to the WAN AEBS port and a cable from the LAN AEBS port to the ethernet port of my PM G4 867 (Quicksilver). After lots of troubleshooting with a different cable modem and my PB 15, it seems that the AEBS WAN port is dead and the ethernet port of the cable modem AND PM G4 are toast!!:( I guess all three got fried thru the cable.
I have a different cable modem that runs my digital phone so I connect thru it's ethernet port (after provisioning it). It works with my PBs directly and my airport express. I went to the Apple store and they confirmed the WAN was inop. Got a new AEBS. Now, here's my question:
I connect my PBs thru airport, but used the LAN to directly connect to the PM G4. The ethernet port is dead too. What should I do to get the PM connected?
I think the PM G4 quicksilver can accept an airport card (older kind). I can get one for around $100.
Is it easy to replace the ethernet card/port on this model? How much?
What's the best solution? What would you do? Thanks for your help.

I think the PM G4 quicksilver can accept an airport card (older kind). I can get one for around $100.
Yes the QuickSilver has an internal slot for the original 802.11b AirPort card. That slot is NOT compatible with the AirPort Extreme card.
Is it easy to replace the ethernet card/port on this model? How much?
There is no separate Ethernet card. The Ethernet port is built into the motherboard.
If you want Ethernet, the least expensive solution is a compatible PCI Ethernet card.

Is this Ethernet port toast?

White Intel iMac with built-in iSight, running 10.4.11.
Client complained of slow network. Stuck a Powerbook on her cable, ran nice and fast. Activity Monitor showed nothing suspicious. The usual voodoo of repair disk & repair permissions changed nothing.
Booted from a virgin system on an external drive. Console showed the following during a network file copy:
kernel[0]: AppleYukon: bac packet received, length {various}, packet status bits: CRC error
Maybe 5% of these said "MII error" instead of CRC error; another 5% showed no status bits.
Copy ran real slow. Switched over to wireless network over Airport, errors went away, actually ran faster. Stuck cable into Powerbook, did same copy, went fast with no logged errors.
Is this Ethernet port toast?

I've never seen a NIC take a hit that slowed it down rather than fried it. I suppose you've eyeballed the port and don't see a bent pin, corrosion, etc.
I'm thinking configuration or OS rather than hardware. Can you (have you) boot(ed) the computer from another OS or tried a test account to see if that made any difference?

Ethernet port dead !!??

Hello
I get a router with ethernet connection and ADSL network
After a storm my router crashed but my computer was closed before
When I connect Ethernet cable to the new router : no signal, nada, rien!!!
The cable is good, apparently the router is ok
System profiler says OK for infos
Techtool Pro says OK for test
In the Network Utility infos, I see 2 ethernet interfaces which have both speed=0 and for the link :
ethernet (fw0)= inactive
ethernet (en0)= no signal
Can you explain me the problem and eventually repairing process
Thanks very much
Michel

Hi, Michael -
Welcome to Apple's Discussions.
Some thoughts -
The cable is good...
How do you know? Since you have a new router, it would appear the old one got fried during the storm. If that was the case, any cable connected to the router should be suspect. A visual examination of a cable is often insufficient.
Your G4, like many Mac models, has a peculiarity - if the Mac does not detect the presence of a live device attached to the ethernet port during startup, it will disable the ethernet bus.
The solution - make sure the router is on, warmed up, and connected to the Mac before booting the Mac.
Your G4 400MHz model, unless it is a Gigabit Ethernet model, does not have an auto-sensing ethernet port. If it is not a GE model, that means that the ethernet cable between the Mac and the router should be a Patch type cable, and not a Crossover type.

Airport Extreme Ethernet Port Won't Recognize DSL Connection

Hey ya'll,
We had a big thunderstorm -- power in house stayed on but stupid AT&T DSL connection went down. When I got the connection back up, the Airport Extreme continued to give me blinking amber light saying the ethernet cable is not connected -- even when it is. Tried reconfiguring to no avail. Is my Ethernet port somehow fried? Is there something else to try? Any help will be GREATLY appreciated as having to be wired to the DSL is making me very cranky. Thanks!

OK, I just tried another external HD. This time it was LaCie 1Tb. As soon as I connected it, it was recognized by AirPort Extreme. What's puzzling is, that same thing happened with my SimpleTech 1Tb one last night. It was easily recognized by AE and then all of a sudden AE would never recognize it again.
At first, I though maybe these HDs are not supported by AE, but that's not the case. One is LaCie with Samsung HD103UJ drive inside purchased at Apple store, another one SimpleTech with WD inside, and other two are both super reliable Sygate HDs (never ever had any problems with them).
Hmm... I just disconnected LaCie one and tried SimpleTech one more time and it worked. AE can see it again. What's going on in here? Something is definitely not right.
Can't test this port through printer since I don't have one available at the moment.

How do I add an airport extreme to a cable modem with only one ethernet port, while keeping that port connected to my Mac?

I have a mac pro connected by ethernet to a cable modem via ethernet. There is only one ethernet port on the modem.
I want to keep the Mac connected via ethernet for speed. Is there a way that I can add an airport extreme to this set up - for my ipad and roku, and for guests to use - or do I need to buy a router to put between the modem and the mac?
If I need a router, what kind?
Thanks.

The modem connects to the WAN "O" port on an AirPort Extreme router.
The Mac Pro connects to one of the three LAN <-> ports on the AirPort Extreme router.
Or if you do not need the ability to connect a hard drive to the USB port on the router, you can save a bit by using an AirPort Express.
The modem connects to the WAN "O" port, the Mac Pro connects to the LAN <-> port
Either the AirPort Extreme router or AirPort Express router will allow up to 50 wireless device to connect.
There are many other wireless modems offered by other manufacturers as well.

I had a failure of a dsl modem which inturn destroyed my ethernet port of non isight imac G5. In attempt to solve the problem I did a clean install of leopard 10.5.4. I am unable to upate to 10.6,.7 or .8 without freezing system network preferences

Dsl modem failure caused malfunction of ethernet port. In attempt to solve problem I did a clean instillation of Leopard 10.5.4 and then update to 10.5.5 with access to internet through apple usb to ethernet adapter. If I attempt to update software to 10.5.6, .7 or .8 it freezes my network system preferences and computer will no longer shut down. The network connection assistant also no longer sees a connection to the internet throught the usb/ethernet adapter. I have checked they systerm Tech tool deluxe which shows no problems and also used hard drive utility on instillation disk which found no problems. Permissions were also checked as well and no problems noted. Any thoughts as I really like my imac G5.

Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.
If all the above fails, then it appears to be time for a relatively painless Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
http://docs.info.apple.com/article.html?artnum=107120
Just be sure to select Preserve Users & Settings.

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

Is my Ethernet port fried?

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