TiBook with self-assigned IP Address Only

I have a titanium powerbook that has stopped connecting to the internet via the ethernet port. (It does find the internet via its Airport Card, however.) The network utility states that my powerbook as no ISP and a self-assigned one is used instead. I've tried powering down the modem for five minutes. (There is no router.) I've also confirmed that the ethernet source is not the problem, because my G4 Tower connects to the internet via the same cable.
Any suggestions are welcome.
Thanks,
Trevor Monroe

Hi Tim,
Generally speaking, if a computer is set up for DHCP but it can't find a DHCP server, it will assign itself an IP address for that interface.
It sounds to me like the iBook is having trouble talking to the AX (DHCP server). This could be caused by a variety of things, from failing hardware to software bugs to configuration issues.
Has this only happened the one time? If this has only happened once, I'd call it a fluke. If it is or gets to be a frequent thing, we'll need to dig a little bit deeper.

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I have a 2006 MacBook Pro which recently started exhibiting the exact same behaviour as reported by another poster in 2011:
For some reason the computer has started self-asigning its IP address and Network Preferences says that, because of the self-assigned IP, i cannot connect to the network.
I have two other Macs connecting to the same Air Port with no issues and I've tried to duplicate those settings on the MacBook Pro but still get the "self-assigned ip" message
Tried re-setting SMC and PRAM, no change.
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I'm really at a loss to understand what's going on and, of course, not happy that the MacBook Pro can't connect to my network anymore! Help!

The wifi icon shows no connection with the network -- the "!" mark.
However the computer sees the network, i.e. when I search in Network Preferences the network is listed.
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Not to be repetitive but two other Mac laptops are connected to the same network and working perfectly. The network preferences, as shown in the "advanced" section, are the same for all machines, i.e. DHCP is selected and IPv6 is Automatic.

Self-assigned IP address problems

I'm having a problem with my wireless router connection (my Airport card shows the network, but the "fan" is greyed out, and if I choose the network it still doesn't connect - When I check network status I get "AirPort connected to network, but has self-assigned IP address and may not be able to connect...)
I can temporarily fix the problem by going into System Preferences to Network to Airport to Preferred Networks to Assist Me and THEN it will go to my network and turn on the path.
I'm running Tiger 10.4.11 on a G5 iMac with the original AirPort Extreme card, and routing through a Linksys WRT54G attached to a cable modem.
There are a lot of networks in my area, according to my wireless "fan".
If changing channels on my router might fix this, I'd like to give it a try, but I don't know how, AND I don't want to ruin the signal to the other computers in the house, which, by the way, work just fine when the iMac loses the signal.
If there's another way to tell the router to ignore the self-assigned IP address, or to get the AirPort to stop providing this ...
The problem is obviously the self-assigned IP address. The question is what is causing this?
Is it the AirPort Extreme Card?
Is it the Linksys Wireless router?
How do I test to see which it is, without losing the signal from the router to the other computers in the house?
With so many people having the same problem, there must be an answer somewhere.
Can some kind soul please point out the correct path? My tech support (teenager) will be home from college this week, and if I can prove to him that it won't ruin everything I think he'll be up to the challenge.

Hi,
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Check your setup in the router for wireless clients. Log on to it and make sure that DHCP is enabled if you use it and you are in infrastructure mode ( wired/wireless combo ). Also, if the clients are B or G mode, make sure the router is set correctly to that mode or mixed. If the IP addresses are 169.254.xxx.xxx then they aren't really getting an address ( this may only happen in Windows, don't remember). If you don't use MAC address filtering for security, a blank list could have been turned on........ anyways, go through all your router configurations for wireless and make sure they are the same or close to the settings for the wired Mac that works. Probably just a checkmark somewhere that isn't supposed to be. Has anyone been in there messing with it? Good luck.
Michael
MBP 2.16 & 20" iMac Core Duo Mac OS X (10.4.5) Large Windows network & Canon DSLRs

TiBook with self-assigned IP Address Only

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