I will give you now some info the problem with non working Time Machine.
Time Machine is a very user friendly and easy to use Backup solution from Apple. The backup it takes, is connected to Computer which made the backup. You cannot use a TM-backup from Computer "A" to restore something on Computer "B". To identify the Computer TM uses the Ethernet-MAC-address of the built-in Ethernet. Every MAC-address is globally unique and every MAC from Apple has ethernet, so it can be used to identify a computer, if the ethernet port is built-in. An exchangeable PCI-card, like the Netgear GA311, does not help, because the card can be removed (loosed MAC-address) or changed (another, different MAC-address). So TM only works if it can find an internal, built-in ethernet port.
This was exactly the I got from TM. It couldn't find any built-in ethernet port, although the two Realtek 8111C are onboard and hence built-in. For some reason Mac OS X does not detect the as built-in. I don't known how Apple detects their own ethernet as built-in.
I flagged the first onboard ethernet port as built-in using device-properties in the Chameleon com.apple.Boot.plist. I made this device-property with EFIStudio. See here.
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