Fan was silent, now high pitch noise
This is a UX431DA, Ryzer 3700U, firmware upgraded to 3.01.
I bough this computer online two weeks ago. The fan was running most of the time but quite silent, only the airflow noise. Happy with it.
About 5 days ago I was working with the computer and I heard a "click" and now the fan is noisy and annoying, high pitch sound constantly. Really annoying.
My office table is cleaned every day, I am careful about that. No dust, and absolutely nothing big enough to damage the fan. The fan should not pick any dirt in a week of use. I used compressed air to blow any hypothetical dirt. Opening the laptop (only a week of use) shows the inside crystal clear. The fan shows no dirt either, spin freely and effortless.
Computer performance keeps good, no overheating, just regular thermal throttling when I demand performance for more than a few seconds, as usual in this (poorly refrigerated) model.
The fan is just NOISY. Very.
I would request a refund under Spanish laws, if this issue is not solved.