What is the speaker talking about?

Question

Iron

When starting the system, the speaker began to squeak continuously. Before that, bp rattled. I disassembled the power supply unit, cleaned it, found this hat on the capacitor.

He took off his hat - the conder was not puffy, but the little white dot from the hat remained. Windows is loaded, the CPU is normal in terms of loading, before that, fans often worked at the start and the CPU loaded under a hundred. Now the system is working stably, only the speaker beeps incessantly with one long beep. What can it be?
Upd: bp changed, the speaker both squeaked and squeaked. CPUs with one of the hard ones randomly load either normally or up to 100 when the system starts and works in the browser and several windows of the system. There are no blue screens, no obvious dullness, everything seems to be as usual. On the old bp, I ran the Aida stress test paired with an online game and a couple of progs, nothing crumbles, everything is ok. I played on the new one for 5 hours, loaded the entire system and everything was ok.
Mother Gigabyte GA-770T-D3L v1 AM3 Socket
CPU AMD Phenom II X4 945
RAM 2x Kingston 99U5402-061.A00LF DDR3 2 GB
graphics card AMD Radeon HD 6670 (Turks) (Asus EAH6670) 1 GB
Vinci wd3200aaks-00b3a0 320 GB 7200 and wd10eavs-00d7b1 1TB 7200
PSU Asus Green 450W and Gigabyte GZ-EBS45N-C3 450W
Windows 10 ltsb x64
Bottom line: the reason for the squeak was the lack of a fan on the side. Without it, it launches with an endless squeak, everything is ok with it. However, the reason for this has not been found.

Answer 1

Well, where is the logic? And some strange and complicated advice.
It's simple though. Diagnostic basics - disconnect everything from the mother except the processor and start it, after that, according to the results, add one component at a time.

Answer 2

First, name your motherboard model.

Answer 3

unfortunately the speaker does not write, he screams. but in general, the motherboard itself screams to you, to which it is hooked. and in order to understand why she is really bad, you need to know what kind of motherboard you have hooked up to this speaker

Answer 4

When starting the system, the speaker began to squeak continuously.

I remember that a continuous beep in some BIOSes is a lack of memory. But your computer works, so this option is not good. A faulty capacitor in the PSU and generally bullshit in the power supply, PMSM, cannot lead to this either. The polarity reversal of the speaker does not matter, it is non-polar.
Perhaps it makes sense to become attached to this "became" of yours. Try to remember what was done with the computer in those days, and roll it back. You can try to find a restore point at the moment "before this" and roll back to it. Well, to the extreme - a flashing to the latest version.