Laptop died on me

Hi, was doing a fresh format and all was going well. Did a reboot after some software install and laptop proceeded to start windows, then, all lights went out and dead.

The only indication i'm getting for signs of life is the Alienhead is blinking when no AC adapter is plugged in and it's running on battery only. Plug the adapter in and the Alienhead stops blinking and goes a solid colour for a few seconds and then nothing.

Tried the power drain trick but to no avail.

I'm hoping i can get some assistance as to where to start trouble shooting as i don't want to keep buying hardware until i find the problem.

Note:- Not sure if my AC adapter had anything to do with this but i noticed that lately when i had it plugged in there would be a problem where the screen would dim and show that it was on battery power , but virtually immediately then screen would brighten up and say AC was connected, and this would go on for quite a while.

 

Have you tried playing around with the AC cable? It could be broken.

 

Not as yet but i know the battery is charged and it still won't start with only that.

 

Do you see the CAPS NUM flashing?

 

No it's not flashing. Only light i have is around the alien head.

 

Well i finally managed to get it to start and entered the bios as the AC adapter warning came up. Once in the bios i noticed that the 240w adapter i'm using was disappearing showing 0w then 240w again. Problem solved, thanks Alienware-L_Porras. Time for a new adapter.

 

After reading this.. The unit should of powered on with the battery? Is your battery also shot?