Im not sure about the wires in wall I suppose they're not ok but this is my case now that the wall is dry the coil whine is gone . One drop can cause so much trouble
@Biban please elaborate on your 'wet wall'. Are you experiencing brownouts? Are you running your computer on a surge protector? If you have a water leak in your wall that needs to get fixed ASAP. If water is shorting your electrical (or causing brownouts) it could cause all sorts of issues.