Excuse me @vaumax, but I dont think I can give you any more guidance unless I get my hands on a v5535.
It is posible that it is a BIOS or a hardware related problem.
Maybe someone who owns a v5535 or have access to one can make some tests and give feedback.
To @all members who own v5535...
Can you please test and see of you are able to boot (HDD to be recognized) your laptop with Onboard LAN enabled ?