Buzzing Monitor

[mogwai]

I have Samsung SM-215 TW LCD monitor. Which seems to be working fine except when I go to webpages with an all black background.

Is this the sign of a developing issue or is it likely to just be a "feature"?

 

[El_Watcher]

Sounds like it could be a dodgy component on the inverter. Most monitors reduce the backlight brightness when the page is mostly dark to improve contrast ratio, and to do this, they reduce the voltage output by the inverter.

The noise is usually from the transformer or a control capacitor not working properly at the reduced voltage.

You could try and get a replacement inverter, but no idea if that is possible.