iMac built in ethernet link down

Apple Imac all-in-one desktop - customiz...
June 21, 2010 at 21:02:38
Specs: Mac OS 9.2.2 US
I cannot get any internet connection on my Mac.
DHCP AutoConfig appears to detect the settings
properly, but router light is off and Apple System
Profiler states that the link is down. Any help?

See More: iMac built in ethernet link down

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#1
June 22, 2010 at 20:13:05
This is what I think.

Try to connect the Mac directly to the modem.

If the light on off it may be the device itself, the router, as OSX
handles all the settings and protocol for the network and internet
connection. However, there is always a chance that this problem
is caused by any software corruption. I wont bet to much on this
one, but I have been surprised with other hardware components.

If the problem is related to any hardware the solution would be to
get a new router or at least borrow one and try to isolate where the
problem may be. And if the problem is related to software or the
OS you will need to do some test to isolate the problem or the
"easy way" would be to reinstall OSX. Also if you use Time
Machine go back to a back up before the problem started.


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#2
June 22, 2010 at 21:03:30
Actually, It is running OS 9.2.2 and the Mac itself hadn't been
booted since 2005 and according to the dates on the files that
were downloaded, Its internet worked the last time the computer
had been used, But it has been unoperateable for 5 years until
recently this month. It is missing its Airport "WiFi" Card and its
clock/cmos Battery is dead.(every time i boot it up I have to set
the date & Time). As for the router, The router is 100%
operational. It is a Cisco Linksys WiFi Router with 4 ports.
Still Need Help...

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#3
June 23, 2010 at 07:53:52
and Apple System
Profiler states that the link is down.

Sounds like your router is not configured correctly. Plug the modem directly into your mac and see if you can pull an IP address and you have link lights. If so, you need to re-configure your router.

PowerMac 9600(1 ghz G4)
512mb RAM
50gb SCSI
ATi 9200 PCI


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Related Solutions

#4
June 27, 2010 at 20:11:14
About that, To connect directly, I will attempt to try a usb
connection. If it works, the problem will be resolved and I will
post it. If not, I will ask another question.

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#5
June 27, 2010 at 21:39:25
I tried connecting directly using usb, but Arris doesn't support
mac, so I used a cat5e cable. Same thing I started with. So I
upgraded to MAC OS X and now it just says network cable
unplugged. Now what?
EDIT: While using OS 9.2, it was able to autodetect ip settings, but unable to connect. so I tried accessing my router. It would freeze at about half loaded.

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#6
June 29, 2010 at 02:24:14
If the link light led's are not lit & status is link down, then that's a physical problem. The cable itself, or router, or network card is bad. It won't have anything to do with software, until the link lights are working (first step).

Do you have a different cable?

Maybe you need a cross-over cable & not a straight cable? (Was a big deal on older hardware...). Check the color coding on each side of the cat5 cable - do they cross, or are they the same (straight) on both sides?


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#7
June 29, 2010 at 22:05:37
Upgrading(or downgrading) to OS-X will not fix your issue. Using a regular Cat5 patch cable from the modem to the computer might not work, you may need a crossover cable.

You also may just have a bad Ethernet port on the mac. How about posting a screen shot of what you see as the "auto detected settings"?

It was command+shift+3 to take a screenshot in os 9 I think.

PowerMac 9600(1 ghz G4)
512mb RAM
50gb SCSI
ATi 9200 PCI


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#8
June 30, 2010 at 12:26:08
Most of my cat5e cables are silver-plated and I can't see the
wiring. I have a few that I can see, but they are not crossed.
Also, usb lan doesn't work either. But if it is a hardware problem,
How come I was able to get an IP address and all that in OS
9.2?

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#9
June 30, 2010 at 12:47:18
It's called a loopback address

You need to post a screenshot of what you see!

And NO, USB will not work in OS9. OS7-8-9, was designed before USB was even around. Later on Apple added USB support to OS9, but it was never native to classic.

PowerMac 9600(1 ghz G4)
512mb RAM
50gb SCSI
ATi 9200 PCI


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#10
June 30, 2010 at 19:25:00
My Mac did not like my linksys, so I connected through my Netgear switch. It shows the status light and It is able to show up on my network(I can find it using another computer on the network) and it shows all the right ip settings after autodetect, but I cannot get the browsers to work even though it says it has internet connection.
Also, I don't know where you came up with all that crap about
the usb. Both versions have full support for it.

EDIT: I think the reason why it is getting a lan connection with no internet is because it still has to go through the linksys to reach outside. When I get time, I will remove the linksys from the network and post the results.


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#11
July 1, 2010 at 20:28:33
The Netgear switch did not like the Arris cable modem so there
is nothing to post for that, But I do believe that by not having the
Mac go through a Linksys router, everything would work. Based
on the results of all my tests.

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#12
July 2, 2010 at 09:05:51
I don't know where you came up with all that crap about
the usb. Both versions have full support for it.

Where I came up with that crap.... yeah, listen BOY, USB was in it's infancy when OS9 came out. It never had native USB support, instead Apple released a USB extension to enable "some" USB functionality, networking was not among that "some" functionality.

But, thanks, it's not like I was repairing macintoshes back in the early and mid-90's or anything, or was the senior macintosh tech at the company I worked for.

And also thanks for NOT posting that screenshot as I requested so I could attempt to help you with your issue FREE OF CHARGE.

I think were done here.

PowerMac 9600(1 ghz G4)
512mb RAM
50gb SCSI
ATi 9200 PCI


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#13
July 7, 2010 at 09:47:10
lol, well there was a problem with that. I accidentally gave my
mac keyboard away and I was using an incompatible gaming
keyboard. Thus, no screenshot. Also, in response to your
response, the motherboard was copyrighted in 2003 and Classic
was installed.

EDIT: also, connecting the switch directly didn't work and I found out it was because it does not assign a separate address to each computer.


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