[ltp] X200 LCD-related noise

Robert Tomsick linux-thinkpad@linux-thinkpad.org
Sun, 03 Oct 2010 10:25:20 -0400

On Sun, 2010-10-03 at 11:04 +0200, Adam Sloboda wrote:
> Hi All,
> I can't really remember what was my motivation for BIOS upgrade about
> a month ago but I just wanted to say (or make note to myself) that the
> constant high pitched noise from upper right corner of keyboard of my
> ThinkPad X200 will go away only with BIOS 2.06.
> With latest BIOS (3.15) the noise is present since boot and quits only
> when the display is off (or lid is closed or only external monitor is
> on).  Dock presence, brightness level, cpu load or battery mode does
> not matter, it's always there.  Of cource Vista can make it stop too,
> right after loading when the screen goes black, but that's not an
> option.
> I have no idea what it is and I have pretty recent kernel and X.org.
> I did already downgrade to this BIOS some time ago, for similar
> reasons I believe.  How come nobody noticed it for 18 months?

I noticed a similar sound on my X200 when the inverter started going
south.  Not saying that's the issue for you, but the fact that it's only
present when the screen is on makes me somewhat suspicious.