Is it normal for the unit's power supply to make a constant high-pitched buzzing/squealing sound when the unit is plugged in but not running?

It goes away as soon as the LEDs are switched on. Unfortunately, this is the case with all 3 that I now have. However, I have only noticed this since I attached one to the bed and the socket is near the head of the bed.... I'm actually satisfied with the product, but it's just a very, very tedious feature.

Question

Is it normal for the unit's power supply to make a constant high-pitched buzzing/squealing sound when the unit is plugged in but not running? 

It goes away as soon as the LEDs are switched on. Unfortunately, this is the case with all 3 that I now have. However, I have only noticed this since I attached one to the bed and the socket is near the head of the bed.... I'm actually satisfied with the product, but it's just a very, very tedious feature.

Accepted Answer

I have this too and therefore I don't understand the many positive reviews.

Answer

I have that too. I couldn't run it right next to the bed.

Answer

We also have ours right by the bed and can't hear anything. No matter whether it is on or off.

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