LAN Cable problems

[Leitwolf]

So basically i moved my PC from the study room to my room, everything worked 100 percent . Bought a longer LAN cable (40m) and plugged it in , but it doesn't pick up my PC? It says for minutes identifying and then unidentified network. But when i plug the same cable in my laptop it works?

Nothing wrong with the modem because if i use a different LAN cable (shorter one) then everything is fine.? But this certain one doesn't want to work on my PC?

Is it something to do with crossover or something? Please explain? and then how can i sort this problem out without removing the lan cable because it took me an whole day to set it up in the roof/walls.

Thanks guys

 

[blueowl]

mmmmm, interesting. Usually when you are having trouble connecting on the local network the problem such as this indicates cable problems, however the laptop connecting makes it a bit more tricky.

Some ideas/suggestions/things to check:

1) do both your desktop and laptop have same or similar network settings (it is possible, for example, that desktop is set to auto DHCP settings, while the laptop has manual IP settings. Thus, the laptop is getting the IP address because it's done manually, while the desktop is not). Is this the case by any chance?
2) is the LAN port/adapter on the desktop a built-in one (on the motherboard) or on an add-on card? If on an add-on card it could have gotten out of its PCI/PCI-e slot while being moved - perhaps check that?
3) is there a way that you can use another LAN cable to connect your modem/router and the desktop machine (even if temporarily)? perhaps connect a few shorter cables together, or take the desktop machine temporarily back into the study and plug in a different LAN cable into the desktop machine and check?
4) (not very likely but may be a possibility) - try to plug in the long LAN cable you laid down into another port on your modem/router and see if that changes anything?
5) (if you have the crimping tool and spare plugs) - replace the network plugs on the long LAN cable with new ones - it is possible that the contact between the LAN cables and plugs is not firm enough, thus not giving you the IP address on the desktop machine (not very likely but worth trying)
6) last but not least check the LAN cable along its full length, for any cuts, larger bruises etc. that could point out to damaged cable along the way.

The lesson for me would be to, in the future, test the cable on the target machine before laying down the cable across the entire house.

Don't have any more ideas other than the above, but try the above and see if it helps..... good luck!

 

[Sola Scriptura]

So basically i moved my PC from the study room to my room, everything worked 100 percent . Bought a longer LAN cable (40m) and plugged it in , but it doesn't pick up my PC? It says for minutes identifying and then unidentified network. But when i plug the same cable in my laptop it works?

Nothing wrong with the modem because if i use a different LAN cable (shorter one) then everything is fine.? But this certain one doesn't want to work on my PC?

Is it something to do with crossover or something? Please explain? and then how can i sort this problem out without removing the lan cable because it took me an whole day to set it up in the roof/walls.

Thanks guys

Hey man what modem do you have?

 

[DarrynB]

So basically i moved my PC from the study room to my room, everything worked 100 percent . Bought a longer LAN cable (40m) and plugged it in , but it doesn't pick up my PC? It says for minutes identifying and then unidentified network. But when i plug the same cable in my laptop it works?

Nothing wrong with the modem because if i use a different LAN cable (shorter one) then everything is fine.? But this certain one doesn't want to work on my PC?

Is it something to do with crossover or something? Please explain? and then how can i sort this problem out without removing the lan cable because it took me an whole day to set it up in the roof/walls.

Thanks guys

If it isn't so already try setting a static IP on your PC.

 

[Leitwolf]

mmmmm, interesting. Usually when you are having trouble connecting on the local network the problem such as this indicates cable problems, however the laptop connecting makes it a bit more tricky.

Some ideas/suggestions/things to check:

1) do both your desktop and laptop have same or similar network settings (it is possible, for example, that desktop is set to auto DHCP settings, while the laptop has manual IP settings. Thus, the laptop is getting the IP address because it's done manually, while the desktop is not). Is this the case by any chance?
2) is the LAN port/adapter on the desktop a built-in one (on the motherboard) or on an add-on card? If on an add-on card it could have gotten out of its PCI/PCI-e slot while being moved - perhaps check that?
3) is there a way that you can use another LAN cable to connect your modem/router and the desktop machine (even if temporarily)? perhaps connect a few shorter cables together, or take the desktop machine temporarily back into the study and plug in a different LAN cable into the desktop machine and check?
4) (not very likely but may be a possibility) - try to plug in the long LAN cable you laid down into another port on your modem/router and see if that changes anything?
5) (if you have the crimping tool and spare plugs) - replace the network plugs on the long LAN cable with new ones - it is possible that the contact between the LAN cables and plugs is not firm enough, thus not giving you the IP address on the desktop machine (not very likely but worth trying)
6) last but not least check the LAN cable along its full length, for any cuts, larger bruises etc. that could point out to damaged cable along the way.

The lesson for me would be to, in the future, test the cable on the target machine before laying down the cable across the entire house.

Don't have any more ideas other than the above, but try the above and see if it helps..... good luck!

Hi there , thanks alot for taking your time to assist , really appreciate it brother..

1 = where do i check the DHCP settings? and i have checked if it has the same settings under right click properties on the local area connection 2 and then configure, everything looks the same.
2 = built in Z97 gaming 3 motherboard /i7 4790 / gtx 680 / ssd 250 / hdd 2TB / 8gig ram / 850w ps + latest drivers are installed and dont have antivirus and other programs that could block it.
3 = as we speak , the pc is now again back at the study room , with a short telkom yellow cable and just plugged it in and works 100%
4 = have tried this , not working with my pc , only the laptop ?
5 = i want to try this , where can i get this parts or is it easier to hire an IT guy for 20 minutes here in pretoria east? haha
6 = brand new cable everything is 100% clean

(another strange thing is when i plug the long lan cable into the laptop , it shows that its connected with my girlfriends wifi at her house , it doesnt say ethernet or anything it says wifi home )

Hey man what modem do you have?

Hi there , its a telkom netgear N300 black router , quite new . like i said laptop works via WiFi and LAN cable but no connection through my PC if i plug in the LAN cable

If it isn't so already try setting a static IP on your PC.

I have tried this , not working , have also tried setting the speed from automatic to 10/100 1gbps ...

 

[Sola Scriptura]

Make sure auto mdix is enabled. it probably is tho.

 

[Cranky]

Hi quick question . Is this a msi gaming 3 board? Or the gigabyte one.

If its the MSi one its that shitty Killer network card i struggled for 3 hours to get mine to work after i changed network cabled. identifies then says cable unplugged. You had to do 2 things.

One was update bios to reset the stupid NIC / Reset everything to factory defaults in bios ( this one worked for a very few people )

Second was to unplug power supply. Remove bios battery and leave it for 30 min ( press power button once or twice to draw power )

As soon as I booted it up my cable got connected.

 

[Leitwolf]

Hi quick question . Is this a msi gaming 3 board? Or the gigabyte one.

If its the MSi one its that shitty Killer network card i struggled for 3 hours to get mine to work after i changed network cabled. identifies then says cable unplugged. You had to do 2 things.

One was update bios to reset the stupid NIC / Reset everything to factory defaults in bios ( this one worked for a very few people )

Second was to unplug power supply. Remove bios battery and leave it for 30 min ( press power button once or twice to draw power )

As soon as I booted it up my cable got connected.

i hate this killer network .. yeah its msi z97 .... ill try this on thursday , thanks man will keep updated

Make sure auto mdix is enabled. it probably is tho.

how do i do this

 

[Sola Scriptura]

i hate this killer network .. yeah its msi z97 .... ill try this on thursday , thanks man will keep updated



how do i do this

just dont use the killer application. yo can use Qualcomm Atheros AR8161 PCI-E Gigabit Ethernet Controller (NDIS 6.30) driver as well with your killer e2200, if that is what you have.

mdix is ten2one enabled with your router , it just makes that you can use either crossover or s straight cable. You can have a look in your settings and see if you can find it. ive no idea were to look for it on your router.

 

[blueowl]

(another strange thing is when i plug the long lan cable into the laptop , it shows that its connected with my girlfriends wifi at her house , it doesnt say ethernet or anything it says wifi home )

This sounds a bit funny..... are you sure the laptop is connecting to the LAN connection and not the wireless? What happens if you do not plug anything into the laptop LAN port, or if you connect a LAN cable that is not connected on the other end? Does the laptop still show as connected? Is there a wireless network at your place?

Can you disable the wireless on the laptop temporarily (by pressing the wireless button on the laptop) and tell us what happens if you plug in the long LAN cable?

Also, please try to connect a known working LAN cable into the laptop and state what happens - does the wireless still show as connected, or the LAN connection?

5 = i want to try this , where can i get this parts or is it easier to hire an IT guy for 20 minutes here in pretoria east? haha

check Communica (they are in Samrand) they have crimping tools and network plugs. If there is a place closer by try them first - maybe if there is a Matrix Warehouse close by, or a computer store. Tell them what you want to do (change the plug on the LAN cable) and they should be able to sell you the plugs (I am assuming CAT-5) and the crimping tool. It is somewhat finicky to change the plug so if you haven't done it before it may take you a try or two until you get it right. Look for "T-568B wiring" on internet, something like the http://www.siongboon.com/projects/2006-03-06_serial_communication/Network striaght cable pin out.gif for example.

1 = where do i check the DHCP settings? and i have checked if it has the same settings under right click properties on the local area connection 2 and then configure, everything looks the same.

yeah, that's it - as long as both machines have the same settings that you have already checked - properties under local area connection.

My feeling is that the laptop is not connecting through the LAN cable (and that is what is adding to the confusion), but for some reason thinks it is connected (to wireless). Maybe one last thing; try to actually open a fresh web page or something in your internet browser on the laptop and see if it actually shows that the internet is indeed connected. The laptop connection could be showing that it is connected to the internet, while in fact it may not be.

good luck,