Cannot obtain IP in Windows Xp

Hewlett-packard / Presario ze 4145
September 7, 2010 at 10:42:35
Specs: Windows XP Professional, AMD?/1 GB PC2100
Windows XP cannot obtain an IP address.

Pavillion HP ZE4145 Laptop with 40 gig HDD, 1 GB RAM, AMD processor (unknown speed or model number). No wireless capability without external (USB or PCMCIA) connection.

I recently repaired this system and was able to use an ethernet cable to connect it to the internet through a linksys router and cable modem without any problem. I sent the computer back to its owner in Arizona, I am in California, only to have both he and his brother, from two different locations get an error stating "Limited or no connectivity," and neither is able to access the internet.

Using MSCONFIG, I had them verify that the DHCP was running. It was.
I had them open a command window, then using IPCONFIG, verified that each could get an IP address in the Autoconfiguration IP address. It did. I had them use IPCONFIG /Release and IPCONFIG /Renew which resulted in the IP address being released, but was unable to renew it.
Next, I had them use netsh to reset the IP log and winsock catalog. (I may be running those two actions together in this statement but each was done separately).

I am at a loss of what else to try.

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September 7, 2010 at 10:47:36
"verified that each could get an IP address in the Autoconfiguration IP address"

this only means they get a 169.254.x.x ip if no dhcp server is found. This is in conflict with your next statement of dhcp release/renew with no ip. If you had set this to no then with no dhcp server answering the request you would result in no ip.

Appears to me they are not connected to a device giving out dhcp ips.

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September 7, 2010 at 15:04:04
You are correct, the IP addy is a number. At both of the locations where they have tried to connect it to the Internet via the ethernet cable, they are attaching it too a cable modem, no router. This IP address is available when the computer is first turned on, yet the Internet cannot be accessed. When the IP is released, the attempt to renew it does not work, the error message of unable to establish IP or something like that is displayed.
Is setting the IPCONFIG /RENEW with no IP something that I want it to do? Is that not what the IPCONFIG /RELEASE does?

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September 7, 2010 at 16:15:47
A auto assigned ip like 169.254.x.x has no gateway ip address. You get this ip as a last resort when configured as a dhcp client but no dhcp server replies to the request for an ip address.

no gateway ip means no internet access

ipconfig /renew/release is when you have a dhcp server to talk to.

It appears these pcs have no dhcp server to talk to which is why you get the response you do.

I would suggest you confirm that "obtain an ip address dynamically " is checked

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September 7, 2010 at 18:11:25
If by dynamically you mean automatically, it is. Also, this is one laptop that has been connect into two completely different locations and is still getting this error.

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September 7, 2010 at 18:28:05
if connecting to a modem, and the isp service maps the mac address to the ip address, no other computer can get on this connection. That is why "clone the workstation mac address' option is available in all routers.

There is no excuse for not getting a ip address if connected to a router that has a big enough ip scope and is acting as a dhcp server.

confirm the conditions.

otherwise logical conclusion is the hardware was failing and your test was a lucky break.

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September 7, 2010 at 21:08:31
At the time of each of the attempts, the computer in question was the only computer connected to the modem. The modems in both incidences work perfectly on other computers, using the same ethernet cable and a replacement that was purchased after the initial attempt. The computer in question registers that the cable is plugged in and when it is unplugged.

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September 10, 2010 at 10:49:59
The computer and the modem alike are working no problem. The computer reads the cable being plugged into and removed from the RJ-45 jack on the laptop (thus the back of the motherboard). Would that not show that the jack is working? As was previously stated, in both locations, the modems are working exactly as they are meant to on other computers without any problems.

Is there a set of instructions that I can follow to treat the computer as a new entity to the internet. Set up the network connection and such?

Also, I kind of remember something like this happening on another computer a year or three ago. The problem was something to do with a winsock error. Is that possible and what would be the cure to that? (In earlier posts, I mentioned that I had cleared the winsock catalog to no avail).

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September 10, 2010 at 11:47:06
If the computer can't get on the internet it can't get infected or have a winsock or other error. The cable upplug/plug message does not guarentee the port is fully functional.

You confirmed the following conditions;
other computers get a dhcp address from the modem/router?
what was that ip address? did it also contain a gateway address?

Put that ip and that gateway as static entries into the tcp/ip properties. Does the laptop connect to the internet?

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