Replaced motherboard & question on WIN 7 SW product key(5 posts)
Assume Out of Warranty Catastrophic Failure of the Original MB and Components not caused by you or abuse.
1. Try Activation by normal manner after installation.
2. Boot up in Built-in Administrator Account.
In command prompt, type in SLUI 4 and press <Enter Key>
Follow Directions to use TELEPHONE AUTOMATED ACTIVATION using telephone and computer key pads.
This requires you to be FAST and ACCURATE.
The Answer to the Last Question Should Always be ONE.
No guarantee on above method as I've never used it on an OEM machine but worth a couple of tries.