Anyone know whats causing this?

[MrDuJeR]

I can hear a loud annoying buzzing sound when i turn the monitor back on sometimes not always and its really loud can hear from across the house.

 

Heard it twice in the past month.

 

The monitor is Asus PB238Q and connected via displayport.

 

[espurritado]

sounds like some kind of malfunction with the speakers, not sure what the solution could be

[Tech_Dreamer]

should go for a professional help, give it to a local repair guy or get it RMA'd

[Omon_Ra]

Sounds like it could be a bad ground somewhere as well. But it's not a good sound... Did you try using DVI or HDMI?

[MrDuJeR]

Sounds like it could be a bad ground somewhere as well. But it's not a good sound... Did you try using DVI or HDMI?

it doesn't happen always so changing cables might be a long shot. The sound stops if you tun the display off and turn it back on.

[Omon_Ra]

I had some weird issues with my Asus P238A and DisplayPort. On occasion just the Asus display (I have an old HP 1600x900 display as secondary) would have moire-like problems when waking from sleep or on boot. Never had any issues on the HP display, so I figured it was the monitor. Turning it off and on again would fix it. I switched to a DVI connection and it hasn't happened since. What GPU do you have? In Googling about it, it seems that Nvidia cards have random issues with DisplayPort.

[MrDuJeR]

I had some weird issues with my Asus P238A and DisplayPort. On occasion just the Asus display (I have an old HP 1600x900 display as secondary) would have moire-like problems when waking from sleep or on boot. Never had any issues on the HP display, so I figured it was the monitor. Turning it off and on again would fix it. I switched to a DVI connection and it hasn't happened since. What GPU do you have? In Googling about it, it seems that Nvidia cards have random issues with DisplayPort.

I have a gtx970 i disabled the speaker on the monitor and haven't heard the sound yet. if it happens again i will try chainging the cable.