iMac ethernet card troubles after hard drive upgrade

I have a 24" early 2008 iMac 2.4ghz machine that had a hard drive failure last week. After replacement, I loaded the original leopard os, then snow leopard, and then straight to Mavericks. Loaded my Time Machine backup after that. Updated all other software last. Everything went great. But during the whole install, My ethernet would not connect. Not just with Mavericks. WiFi works great. Tested cable and router on another machine. all good. In network settings, my ethernet has no ip address. Reset all equipment with no results. Ran AHT and all hardware tested good. Any ideas?

This is what pops up when I go into the Ethernet Card in System info. Does this mean anything? All Greek to me.


Marvell Yukon Gigabit Adapter 88E8055 Singleport Copper SA:

Name: ethernet
Type: Ethernet Controller
Bus: PCI
Vendor ID: 0x11ab
Device ID: 0x436a
Subsystem Vendor ID: 0x11ab
Subsystem ID: 0x00ba
Revision ID: 0x0013
Link Width: x1
BSD name: en0
Kext name: AppleYukon2.kext
Location: /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/AppleYukon2.kext
Version: 3.2.3b1