car wont start

[carwontstart]

i need some serious help every time i turn the key i get a click and the engine doesnt turn at all and sometimes ill get this weird nose coming from the headunit area its kind of like a screaching nose and i dont know what it is i keep doing this and if im lucky it will turn about 5 times and if im really lucky the car will start. so far iv installed a new starter, battery, alternater and its still messed up. can somebody help me out here im desprate.
thank you.

 

[pr0]

Things to check:

--> Engine fuse - try taking it out, clean the contacts and stick it back in
--> ECU - your last hope