Dell Dimension 2400 PC Desktop "pull cord skips" Questions

...is with my desktop. I've skipped the router to go directly from the modem to the desktop. I've also pulled out another ethernet cord. No luck. Any other thoughts? Thanks! The NIC (network interface ...

...pull the drive up and away from the door. If you need to, remove the sled from the old hard drive (4 screws, 2 on each side) and attach the sled to the new drive. (If the new drive came with a sled, ...