Hi @stephenmeehan
I am almost certain that the issue is your power connector on the monitor. Especially because the white buzzing noise that you mentioned in your question.
These wider monitors usually operate on a 19V power supply with currents up to 3.5-4.5A. The connector is similar to a laptop DC IN connector with 2 inputs (V+ and GND) and usually they are soldered on the motherboard by 3 or 4 legs.
The static noise you heard was probably a leg come loose in that connector due to physical and/or electrical stress (almost 85Watts) at this tiny connector it may be burnt and/or broken and that is why the monitor is not turning on.
If you are able to take the monitor's back cover off and measure the input voltage, which should be 19V on the connector, you should see either 0V or a non stable voltage if you move the cable in the connector. If this is the source of the fault, you can desolder old connector and get a new one soldered in. If there was a short created by the loose connection at the power input, you may have a blown fuse on the motherboard as well.
[image|2662767]
[image|2662770]
Here's a link to a video on how to open the monitor:
https://www.youtube.com/watch?v=dlMphcRP_Zw
Hope it helps!