New problem WITH the logic board replacement

Hi Everyone,

I sent my computer in recently to get a whirring fan noise repaired, but after receiving my macbook, I have developed the whine.

They tell me they replaced the logic board, but I didn't even ask for one. Now I have a loud whine coming from the left side of my computer near the adaptor.

I guess my question is, is it possible to develop the whine after the logic board has been replaced and why Apple replaced a logic board which had no whine.

Thanks for the help.