Member Avatar for haruka108

i've searched around the site and found some threads, but i couldn't really understand them, so i started this...

first off, i have 3 computers connected to a router, then to a dsl modem... all wired...

my computer connected to the internet fine in the morning and evening after i got home from work. it was hot today, so i turned it off briefly, but when i turn it back on again, it won't connect to the internet.

since i have 2 more computers at home, thought i'd try them, they can connect to the internet (i'm on one of them now...)

i don't believe this is a virus/spyware problem because i disconnect from the internet manually when i'm not on it...

i'd appreciate it if anyone can help me since i can't stay on this computer too long. thanks in advance

by the way, i can't even connect to the router on that computer

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  • Latest Post Latest Post by rwaforums

Dani AI

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Given ’s follow-up that a replacement NIC restored connectivity, the most likely cause was a failed onboard Ethernet controller or a driver/stack conflict. Replacing the motherboard is not usually necessary — the practical, low-cost approach is to leave the working add‑in adapter in place and disable the onboard device, or use a USB/PC Card adapter for laptops.

If you want to make the add‑in card the primary adapter and stop Windows from trying to use the broken onboard device, do one of the following:

  • Disable the onboard LAN in the system BIOS (restart, press the vendor key — Del/F2/F10/Esc — then look for “Onboard LAN/Onboard Ethernet” or “Integrated Peripherals” and set it to Disabled; save and exit).
  • Or disable it inside Windows: open Device Manager, expand Network adapters, find the onboard adapter and choose Disable (not Uninstall — uninstall can cause Windows to reinstall the device). If a driver keeps reappearing, show non‑present devices and remove old drivers (run the commands below to open Device Manager showing hidden devices).

To clean up the Windows network stack and remove leftover bindings, run an elevated command prompt and execute:

set devmgr_show_nonpresent_devices=1 && start devmgmt.msc
netsh int ip reset resetlog.txt
netsh winsock reset

Reboot after the netsh commands.

Other quick checks and tips: confirm link/activity LEDs light when the cable is plugged in; set adapter speed/duplex to Auto‑Negotiate if you see weird link speeds; power‑cycle the modem when you swap NICs (some modems cache a registered MAC address); and, if you re-enable the onboard device later, update the motherboard/chipset drivers first. As noted, uninstalling alone can be misleading; and as suggested, using a cheap add‑in card and disabling onboard is almost always the simplest, least expensive fix.

Recommended Answers

All 22 Replies

Member Avatar for haruka108

anyone?

Member Avatar for hungry_for_info

is ur computer set up for DHCP or does it have a FIXED IP

Member Avatar for haruka108

DHCP, i believe, since i have dynamic ip
i checked the settings on it and it has automatically obtain ip address and dns server address checked

Member Avatar for haruka108

update

i try to do ipconfig/all, but it gives me an error saying request cannot be completed

help! this is driving me a little nuts... getting used to using my laptop is good, but i don't want to use it for good~~

Member Avatar for hungry_for_info

have you tryied connecting the computer directly to th modem to see if it connects that way? here is the proper command for looking at the ip's ipconfig /all u need to have a space after the ipconfig.

Member Avatar for haruka108

i tried connecting just to the modem, but still nothing

ipconfig /all
gives me the same error

if i do just ipconfig, it gives me the same error too

Member Avatar for hungry_for_info

another thing you can try iis to right click on mycomputer then select manage then device manager, loook for network adapters then nic card or ethernet card then right click on it and uninstall it. after you uninstall the ethernet card reboot. this might work. if this doesnt do it and if ur card is a pci slot nic card remove it then reslot it and see what happens

Member Avatar for haruka108

ok, i just tried that, the card reinstalls itself when i rebooted, but still doesn't recognize the connections...

from what i can see, my card is built onto the motherboard...

Member Avatar for hungry_for_info

by chance are you use a firewall? if so try to disable it and see what happens. can you also tell me the Ip you are getting now.

Member Avatar for haruka108

i use the windows firewall...
i still can't get an ip after i disable the firewall...

Member Avatar for hungry_for_info

do you have any Ip's? or, is the Ip's

Member Avatar for haruka108

i get an error when i try to use that ipconfig, so i'm not getting anything at all

Member Avatar for rwaforums

Can you post the make and model of your router?

Member Avatar for haruka108

d-link di 604
but i don't think it has anything to do with the router, since it works fine with the other computers
and the computer with the problem doesn't recognize the connection even if i connect it just to the modem

Member Avatar for hungry_for_info

have you try using a different rj45 cable?

Member Avatar for haruka108

yea, i did

Member Avatar for hungry_for_info

i think you should try using a pci ethernet card or a usb and see if it works.

Member Avatar for haruka108

i guess i'll try that... if that doesn't work, i think i'll just get a new computer... they're not that expensive nowadays...

thanks a lot~ ^_^

Member Avatar for hungry_for_info

you don't need to buy a new computer, if it doesnt work you can always reinstall windows. this will work if it is software related, but if its hardware then putting a new ethernet card should work too.

Member Avatar for rwaforums

i guess i'll try that... if that doesn't work, i think i'll just get a new computer... they're not that expensive nowadays...

thanks a lot~ ^_^

That's not a great way to go about it. If the router is broken, then get a new router, far cheaper than buying a new computer.

Member Avatar for haruka108

tried a new ethernet card and the router does work...

i called my vendor and they said that something related to the connection thing is built into the computer... and i looked at it, it's on the motherboard... then i'd have to change the whole motherboard for it to work? and if it's just one part, it's still on the motherboard, then it requires shouldering? then i'd have to bring it some place, have them fix it... it might cost me even more to fix it then to buy a new one...

Member Avatar for rwaforums

Simple, buy a new ethernet card and disable the onboard ethernet.

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