High pitched Noise from new zBooks

[rBlue]

I have a zBook 17 G6 workstation notebook that are producing a very high pitched electronic noise.  It sounds similar to the kind of noise a bad capacitor, or other bad electronic components, that will be made in some electronic circuits.  It can be very loud and is overly obvious in one of my USB headphones, of which it is a pronounced hissing and crackling.

I've seen other postings pertaining to this problem, but I have not found any official statements from HP on what the cause is, or if they will fix the problems.  I did see a few comments stating that HP was unable to resolve the problems, even after sending in their computer a few times.

So, what is HP's official stance on issues such as this, that sounds like there may be bad electronic components that are producing high pitched noises?

  Thanks,

   rBlue

[RogerAndOut1]

Probably I have (had) the same noise, it's awful. Its called 'coil whine'.

For my particular case the reason was keyboard backlight (!). When I had set it to be on full brightness all the time,

no bad noise. After kb backlight goes off, sounds start after several seconds. Oh yes, and on the 'middle' setting of

backlight the noise had most awful pattern, like 'ew-ts-ew-fshh' (it's not loud of course, but it's audible and very annoying).

1. Had backlight always on and on max -- no noise;

2. Seems that after BIOS update 01.05.03 the noise completely gone;

P.S. I still do have the issue of having fan spin at max when laptop is shut down (really shut down) or S3 sleep mode, (just mentioning maybe someone will have similar issue)