[Ti] noise from Ti only during battery use

[Don]

Oy!! No Applecare. I presume if the power inverter goes, there's no operating the 'book with or
without the power cord.

I take it this is an expensive repair. Hmmmm... I do like the looks and performance bump I'd get
with a new AlBook.

Thanks for the input.

Don

Richard Grable wrote:

> This happened to my Ti500 and it turned out to be a bad power inverter. Hope you have AppleCare.
>
> >
> >I've recently noticed that when I operate my Ti 400 on battery power, I get a high
> >pitched noise which is electrical (versus the sound of, say, a drive going bad). It
>