if the RED LED is ON and the GREEN LED is NOT BLINKING
the board is not booting from that SD card.
so
you wrote:I've installed noob on my SD card
lets start again:
-a- new download system from internet to PC
if you need to setup a MULTI BOOT system of more than one OS
use NOOBS / NOOBS LITE / PINN LITE
download from
https://www.raspberrypi.org/downloads/noobs/ or
https://sourceforge.net/projects/pinn/
if you already know you need RASPBIAN Desktop..
download from
https://www.raspberrypi.org/downloads/raspbian/
-b- unzip to PC
-c- if NOOBS copy / if IMAGE burn with win32diskimager or ETCHER to SD card