Music bios. or how computers sing

Many of those who encounter computer malfunctions have heard various sounds when turned on. These sounds are not simple, but informative - bios gives signals depending on the fault, etc. Usually these sounds are quite simple: for example, 3 signals - a video card malfunction, one long signal - a RAM fault, etc. Each BIOS manufacturer has its own signals.
Actually the story


Yesterday, my neighbor and I decided to transfer our router (to vyatta os) to another hardware. “Scratched at the corners”, assembled: slot motherboard (Chaintech 6BTM0 N100A), slot processor P3-450 MHz, 3 slats of the RAM (64MB, 16MB and unknown) video viewer (for the installation time) Riva TNT 2 and a pair of network cards. They put it all in a pre-prepared building and got ready to launch ...
I have never heard that bios played music like this :)
(you can watch the video)


Actually, the monitor at this moment was not yet connected, and the thought arose that there must be men dancing and something incredible happening :)
But, of course, there was no picture on the monitor.
Immediately suspecting an unknown amount of RAM (was unverified), take out the third bar and repeat the inclusion. Same story, same melody.
There is nothing to do, they thought about the video card, replaced it with another one (lying under the bed), as it turned out to be non-working, and the melody changed, or rather turned into an ambulance
')
(can be heard on video)


In the process of short-term swapping of the iron rails, the Vyatta installation and configuration started and went on (this is a completely different story).

Later, by experience, we found out, without RAM, the motherboard also sings (as in the first video) :)

Here is such a musical motherboard.

Thanks for attention.

Ps now everything works and does not "squeak"