PSU Buzz when room lights on.

[Guest]

My PSU starts buzzing when my room lights are on however not when a lamp is on.

Anyone know how to fix this problem besides the common sense, "leave the lights off?"

 

[festerovic]

Make sure all the electronic devices plugged into the walls are correctly grounded. Check all devices on the breaker or circuit. There may be plugs in a different room that are on the same breaker, though not in the same room.

Is the light in your room fluorescent?

 

[iam2thecrowe]

i was gonna ask that, fluorescent lights may cause this, or power saving light globes. The most likely cause is a particular light globe, switch them with another to do some elimination, then get a new globe. If its fluorescent lights, could either be the tube or the inverter. You can also get a clip on ferrite core for the PC power cable that may remove some of the noise going to the PSU.

 

[Twoboxer]

What brand/model is your PSU please?

And do you have dimmer switches on any of the lights?

Finally, have you tried a long extension cord to plug your PC into a different circuit? If that stops the buzzing, maybe something somewhere on your room's circuit breaker there's a device (eg dimmer) that's (eg) chopping the normal AC sine wave.