Coil whine tweeting sound when Plugged in with a fully charged battery
I have been having this issue that started spontaneously a few weeks ago with my 2023 Zephyrus M16 GU604VI. Posted about it a while back but text alone isn't descriptive enough so this time I have included a video demonstration of what is happening.
When the laptop becomes fully charged (or reaches 80% on battery saver) and the battery status becomes idle, if I am doing low power draw work on it (uni assignments, internet browsing, or just idling etc.) , it will continuously make this chirping sound which is slightly different from the usual coil whine I experienced on and off with this model. But when it's under high load (gaming, rendering etc.) it stops making that sound.
For now, from my personal debugging, I am thinking that it is one of the following possibilities:
1- Faulty charger. (I kind of doubt that since there is no immediate sound coming from the ac adapter or the socket)
2- Something shorting on the board. (Though there is no sudden shutdowns and the laptop is able to boot up perfectly fine, I have started experiencing more perfomance drops and stuttering. I also had an episode of R/W issues even though ssd health, attributes and benchmarks say otherwise. And the fact that the cpu is a 13th gen intel is also concerning because of known instability issues)
3- Wear and tear on the charging port. (Havent cleaned it in a long while, nor do I know how to do so properly.)
4- Faulty battery. (Used to be at 86% (77/90 Wh) consistently for quite a despite always being plugged in but with battery saver. After this issue started I tried testing the battery by finally taking it to 100% after god knows how longand kept it there for 2 hours or so while plugged in to examine the noise. A few days later the max capacity abruptly fell down to like 79% (71 Wh). It is stable at this new capacity ever since so I think it may have been possible recalibration at a firmware level in response to learning the new 100% capacity. But at the same time this 5Wh drop happened over a day.)
Has anyone experienced this before or has any idea if this is something to be worried about? I would prefer avoiding an electrical hazard going haywire but at the same time this laptop has had a different kind of harmless coil whine (unrelated to this particular one) for years now.
