my receiver and its noise, help me!!

[minam3004]

Hi everyone.
I have yamaha htr 5450 receiver.
it makes electronic noise like "bee" sound.
it's sound can be changed according to brightness of LCD, the brighter the more noise.
What is wrong?
Just power is on, it makes noise even when no movie or music plays.

Please help me!

[noddin0ff]

Question. Your receiver makes noise or your speakers make noise?

[Glen B]

Question #2. What is the position of your receiver's volume control when you are hearing this noise ?

[minam3004]

Question #2. What is the position of your receiver's volume control when you are hearing this noise ?

the speakers do not make noise.
when my speakers with other receiver, it did not make noise.

and volume control doesn't matter, whether it is low or high it makes noise.

as soon as power on, it starts to make noise.
When I use headphone, it makes same noise through headphone.