MacBook just back from repair, whining now?

Hello Everyone,
My Macbook suffered from that awful discoloration issue, and I sent it in a month ago to get the case replaced. While it was there, the Apple people said that they needed to replace the logic board too...
So it took them a whole month to get it back to me. And now, finally - I just plugged it back in! But, now, to my dismay, there is an awful squealing whenever the power supply is plugged in. What the **** is this all about? Is there a solution? Should I send it back!?
- Alex
Macbook   Mac OS X (10.4.9)   1.83Ghz Core Duo, 2GB ram

If you send it back you'll probably get another whiner. It's annoying, but typical for MacBooks (MBPs too). The whining is caused by the CPU saving power (if I'm correct) when it's hardly being used.
Try to not let it get to you and in a while you won't even hear it anymore. I'm speaking from personal experience. I'll sometimes hear it when I'm in a really quiet room studying or during lectures/seminars at college. I let it go.
Just enjoy your fixed MB !
Billy.

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