Review on Acer V246HL Bmdp Widescreen Monitor 1920X1080, ‎UM.FV6AA.004 by Jason Palmer

A few months later, one of the several monitors we bought started humming loudly from the speakers. When disconnected from the audio input, the monitor works normally. But you buy a monitor with speakers for a reason. I sent it in for warranty repair. Acer didn't fix it. Diagnostic/repair instructions were displayed, it worked and did not buzz. The speakers weren't even tested. Now 3 more monitors with the same problem. I will not buy Acer again.