Desktop computer won't connect to the internet.

madrerik

Distinguished
Jun 25, 2013
85
0
18,640
Two days ago my ISP replaced my modem-router for a new one. Ever since the replacement, my main desktop computer won't connect to the internet "immediately". I checked the connection via ethernet and WiFi with my other computers (even tested every single one of my ethernet cables) and they work perfectly fine, except for my main desktop computer.

What my desktop does:

When I turn it on I have to wait for around an hour before it connects to the internet. During that hour, it attempts to identify something (I guess the IP? - the yellow warning icon gets displayed) and after 3 seconds of attempting, the connection drops and it goes back to saying "No connection". The connection is being made via Ethernet cable and I tried the troubleshoot but it continues to say that I need to plug-in a ethernet cable to my computer, thing is it is already plugged in and like I stated above, the cable worked fine with all my other computers. My desktop used to work perfectly fine with my old modem-router.

I attempted to do do some troubleshooting refreshing my ip using the cmd with admin privileges but nothing worked as it said every time that there was no media connection. My desktop just randomly connects to the internet by itself after an hour of attempting to connect and disconnecting and once it gets connected it works perfectly fine until I restart my computer or turn it off and then the next day it'll be the same thing over again.

This has gotten extremely annoying, what can I do to fix this and further prevent it from happening? - I updated all my drivers and it's still the same. It'll just connect to the internet whenever it wants to.

Please help!!
 
Solution
I would HIGHLY recommend a brand new cable and to double check that the drivers for your network interface are up to date. Does your connection go direct to the router or does it go to a wall plate?

It sounds to me like your motherboard is having trouble auto-negotiating the connection speed 100 vs 1000Mbit. You could try forcing your motherboard's network interface to 100Mbit to test that theory.

kanewolf

Titan
Moderator
I would HIGHLY recommend a brand new cable and to double check that the drivers for your network interface are up to date. Does your connection go direct to the router or does it go to a wall plate?

It sounds to me like your motherboard is having trouble auto-negotiating the connection speed 100 vs 1000Mbit. You could try forcing your motherboard's network interface to 100Mbit to test that theory.
 
Solution

madrerik

Distinguished
Jun 25, 2013
85
0
18,640


Hi Kanewolf, thanks for the fast reply. My cable is new and I tested it on all my other computers (3) and it worked, along with my other 4 ethernet cables. The connection goes directly to the modem-router and my drivers are all up-to-date. Would this really be a motherboard problem? - if I were to switch my current modem-router for the old one (which I no longer have), my desktop would connect immediately (this isn't the first time I go through this, last time I had to go to my ISP's offices and get the old modem-router I had in order for my desktop to work). What I really don't understand is why is my desktop the only one not being able to establish a connection properly, it'll just do it whenever it wants to.

What would you suggest I do? Also, how do I force my motherboard's network interface?
 

kanewolf

Titan
Moderator


"Problem" is too harsh a word if it really is an auto-negotiation thing. Try configuring the 100Mbit speed. Go into device manager -- highlight the network adapter -- click on properties -- then the "advanced" tab. If you scroll down there should be a "Speed and Duplex" -- Try changing it to 100Mbits Full Duplex. Then reboot and see if that helps. If not change it back to Auto Negotiation ...
 

madrerik

Distinguished
Jun 25, 2013
85
0
18,640


I changed the speed and duplex and it didn't work either. I was also on the phone with a Microsoft technician and we just disabled/enabled the network adapter to no avail. My computer continues to try to identify but after three seconds, the connection drops. It managed to grab the IP address, subnet mask and DNS during the three seconds it connected. Should I put those manually in the IPv4 properties?
 

kanewolf

Titan
Moderator


You can definitely try that. Here are instructions for setting a static IP address.
 

madrerik

Distinguished
Jun 25, 2013
85
0
18,640
I found the solution!.... and I am ashamed as to what it is. I went to radio shack and bought a fifth cable and BAM instant internet.... thank you all so much for your support!!
 

kanewolf

Titan
Moderator


Like I said, ALWAYS suspect the cable first, and second, and maybe last ....