chime, just white screen and loud fans

Hi

So I got this macbook from a freind, it was working fine until one day, there was the chime but just loud fans no apple logo or anything else, a PRAM reset is not possible I ve reset the smc a couple of times and tried all different combinations of RAM etc, I can t seem to find a description of this problem anywhere

thanks

Damien

hi

thanks for your answer, I tried connecting a display and nothing happened, still the same thing, I ve considered it might be RAM slot death or a bad smc chip, and the unit doesn t have a hard drive in it but it never gets the folder with a question mark it just has a white screen and, also the caps lock light doesn t turn when its on, yet it clearly lets me reset the smc, so it is a very strange problem

I figured out what it was

it turns out the wifi/isight cable was preventing startup for some reason with it disconnected it starts up just fine