I have a dell inspiron. i have a dell inspiron 5000e that won't power up. the battery is dead but

Question

i have a dell inspiron 5000e that won't power up. the battery is dead but the adapter works. after pressing the power button the left light beneath the screen turns a solid green and the center light blinks green. the light on the right does not become active.. the fan turns on briefly--- 5-10 seconds-- than stops. nothing more. the bios screen and the windows starting up screen showed up initially but no more. i've tried plugging in a seperate monitor but no results. pulled and reinserted battery and harddrive. haven't tried the memory yet. screen is now dark and blank. acts like something is stalling out the power completion. i'm not sure if this is poignant or not but if i leave it sit overnight and it totally cools down, the screen has responded and after firing up gets to the startup screen and then stalls.thanks