Laptop Won't Start (Booting), But Fan Spins

Hello,


I have been into a problem with my laptop. I just does not boot but the fan spins and the only light that shows up is the wi-fi.

Possible solutions I tried but did not work are:
upside down technique.
the battery removal and chords, plus , 30 second-press on start method.

I want to try it on CMOS reset through jumper but I just can't open the laptop, I might just make it worse.

One more thing, it seems like the ac adapter is broken because sometimes it won't get the laptop fan spins which the battery can do. But oftentimes it does by finding the right connection (I spin it on the laptop AC connector till I get it working).

I'm tired and sick of this problem. Can somebody help me? Thanks


Specifications:
Dell Inspiron
Windows 7
Inte core i3