Think Station S20 speaker noise by powering off [ Edited ]

[sjhS20]

Hi,

my Thinkstation S20 (4157) always makes a noise (internal and/or external speakers) when I power it off,

it sounds a little bit like if you power off a guitar amp while the guitar is still plugged in.

I´m sorry for the bad  descreption.

The noise is only by powering off, not during restart, on win and linux.

Bios version is  1.39.

Do you have the same on your systems or is it somehow a failure on my S20?

Thanks for your answers!

Edit: Could this be a solution? http://en.wikipedia.org/wiki/Line_filter

[erik Community SuperMod · Accepted solution]

that's just the sound of the capacitors draining.   it's common in all ThinkStation models.   many desktops, workstations, and servers do the same.

there's nothing wrong with your system.

[sjhS20]

Thanks a lot for your answer Eric!

Sorry just another question. If I run Ubuntu (10.04) the power supply makes strange noises, which it never does under Vista. (Since bios update from 1.27 to 1.39) Is it because of low power consumption, because when i start to increase cpu work, it sounds ok.What could I change in the bios to solve it?

Thanks for your reply!

[erik Community SuperMod]

that one is new to me.   it could be tied somehow to power management in Ubuntu but i honestly don't know.

admittedly, i haven't used Linux for over a decade, back when you had to hack your own XF86Config files using hsync/vsync data direct from chipset manufacurer datasheets.   these days everything is point-and-click.   lol

anyway, you could try playing with various processor power management settings in the BIOS to see if that helps.