Ethernet Link Keeps Going On and Off

[Fahd]

I have an issue with a MacBook running Mac OS X where the network link comes on for a few minutes and then goes off and keeps coming on and off.

Sometimes, the link stays active for a few hours and then it goes off again.

Any tips on troubleshooting? Could this be a hardware problem?

I ran the hardware test off the Mac OS X Tiger CD and everything came back fine, but I think that hardware test only tests the main logic board and memory and not the NIC.

Appreciate any help or suggestions!

Thanks!

 

[mad jew]

have you tried resetting the SMC?

 

[superbovine]

check the cable, including sources of interference. (swap the cable with a different one)
trying changing port on the switch

 

[Fahd]

Its definitely not the port or cable; its definitely something on the macbook. I am guessing hardware problem.

I haven't tried resetting the SMC yet but I did upgrade the SMC firmware and still no luck!

 

[Paul Wright]

Its definitely not the port or cable; its definitely something on the macbook. I am guessing hardware problem.

I haven't tried resetting the SMC yet but I did upgrade the SMC firmware and still no luck!

yeah, check again, i had a cable it worked perfectly wih my PC but i could slide the cable out of my macbook meh and i never realised it until i did it with my hand by accident. Changed the RJ45 connector and w00t it works