looks like you have just to replace some pcie power conectors.. just unsolder the burned ones, and replace them by new ones ,an hot air soldier station can do the job , with just a bit of patience ...
They must have burnt for a reason. It may not be as easy as replacing the connectors, there may be damaged components inside...
Agreed..you never know what got fried on the board, the connectors are just the tip of the iceberg. Too bad spons doesn't care about their customers anymore, forget trying to get any decent warranty service on these.