Is it normal when a server's crt monitor goes off when you unplug a mouse or keyboard?

Question

This server at work acts weird but I dunno if this is normal for all servers. whenever a mouse or a keyboard is unplugged, the monitor displays "no signal" until I plug them again. Why does that happen?

Answer 1

This is normal for some kinds of monitors or computers.Don't b worried that's ok.   ; )  

Answer 2

it's probably a security feature, so no-one can tap in withouht input from you.

Answer 3

Cisco certification-http://ccietutorials.com/