High pitched ringing defies troubleshooting
Hey folks - I always go to you before I go to reddit.
I just upgraded the motherboard, CPU, and RAM in my machine (ow.... my wallet...), and I'm in the middle of a re-OS... but the wife and I are finding that the new machine makes a BRUTAL high-pitched ringing noise, like the sound of an old (lol old) CRT television/monitor. Thing is... this high-pitched ringing sound responds to NOTHING. It is unlike any problem I have ever encountered, and I'm no spring chicken.
-Ringing sound (duh)
-Sound appears to be a standing wave in the right places - it exists in certain parts of the room, but not in others
-Sound does not increase or decrease in intensity or pitch no matter what load is on the machine. Even having the case cover on does not dull the sound.
-Tried manually stopping/unplugging all fans one-by-one
-Tried manually stopping/unplugging all HDDs one-by-one
-Unplugged motherboard speaker/buzzer
-Removed video card
-Placed hands over every vent I could
-Rolled up a piece of paper, jammed it in my ear, and moved it around the case to find the sound - I heard the sound in FOUR COMPLETELY DIFFERENT SPOTS. Similar to the room, the sound appears to be a standing wave inside the case.
-Attempted to dampen any metal joint I could find - screws, risers, what have you - and any other thing I could touch (heatsinks, the chipset, pieces of the IO panel, LEDs, anything that might make a noise).
Upon discussing it, I think the noise is electromagnetic in nature, but I'm not sure which of these bagged assholes is the culprit. Do you have any other ideas to try? Otherwise it's probably time to RMA the motherboard...