laptop shut down

[sanjayaskhedkar]

My Dell Inspirion N5010 shuts down after 40-45sec

This laptop starts, boot too, but just before desktop appear its shut off

Its shut down (Total Power Off) in bios mode also(No windows issue)
N0 over heating
Tried in Battery mode too( No over heating)
Also tried in Removing battery means only connect with Ac adopter( No battery or Adapter faulty)
Tried by booting with bootable windows 7 CD (No Hdd faulty)
Rams are in Two banks, total two, tried removing one ram stick and change its banks too but didnt works( No Ram Problem)

Its keep on shuting down after 45 sec without fell

Motherboard issue? Pl help

 

[hang-the-9]

You did not try NEW RAM, but aside from that, probably the motherboard. Does it shut down or just the screen goes black? All lights go off on the system?

 

[sanjayaskhedkar]

Thanks for reply,
I thought all Two Rams could not be faulty. Yes its Motherboard.
its shutting off just before windows desktop screen. Yes All lights goes of