How does a console work?

[iyenal]

That is a pretty general question, I think you need to detail on what're you asking about. You could do books on how a console work.

Uh no. Not books. Thats too wide... unless your idea is that all consoles are working on different modules and system in data delivery.

Even that...

I have written what i want to know.
Like how is a bios written? Where is it written?
I dont see texts in the chip or motherboards of that size .

Where is the information memory happening? And how is it stored.

Each console had its own architecture (except evolution with Gamecube and Wii for example), but recent consoles (PS4/Xbox One) are just PCs with custom system, and the original Xbox.

Basically there's a flash where a small bootloader is included, which does a lot of cryptography checks to see if anything have been changed plus a lot of initialisation (like a BIOS but here no bootable device initialisation), and then everything is moved to RAM including system and here the system run to make its work.
But that's a lot simplified.