On Mon, 17 Nov 2008 13:00:54 -0800 (PST), "borat.gunter"
<borat.gunter@googlemail.com> wrote:

>one friend just plug the 4 pin power connector in the wrong way to her
>hard disc.
>It seems that the part which is used to protect the over voltage has
>been burn-off.
>I am gonna change the part which is "physical" broken and back up her
>data.
>
>i wrote down the label on the component as
>AE VU
>GP804
>it has only 2 pins.
>
>I googled around, did not find the part datasheet.
>has anyone idea or reference of the schematic which is used for the
>hard dics pcb power protection?

Tricky business :-)
But on the bright side: If the part is indeed an overvoltage
protection device (which I doubt) going into 'permanent
protection mode' (i.e. short circuit) you could simply cut one of
it's wires.
As the drive is likely to be toasted anyway, this will either get
the drive working for a while or will otherwise do no further
harm.

--
Kind regards,
Gerard Bok