Windows 10: Why does my Laptop instantly turns off after trying to turn it on?

Hello My name is ParhamI have a problem that when i try to turn on my laptop it instantly turns offMy laptop : Dell Latitude E5550

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Computer keeps randomly turning off then instantly turning back on

Computer keeps turning off then instantly turning back on im really frustratded now becausw if tryed loads of things to stop it but nothing works heres a list of what i tried,

turning off automatic restart, haviving a look at the fans speed and it was normanl, having alook at the cpu tempriture it was normal, testing the ram it was working fine.

i cant find a soulotion and i would really appricate help

 

laptop won't turn on

Dell Latitude D800

few hours ago i turned the laptop off by going to start menu, shut down, on an xp machine. the computer shut down normally but now when i try to turn it back on, nothing happens for a good 30 seconds then the HDD lights and power lights come on for a few seconds then turn off.

it's weird becasue, from what i have seen, the lights usually come on right away then turn right off (in similar situations) but this thing doesn't even try to turn on for a bit. What could be wrong?

things i have tried:
-removed RAM, battery, wireless card, HDD... nothing happens
-held power button for 10 seconds with battery in and out of machine while and while nt plugged in
-Different power adapters

i am going to check the cmos battery but if anyone has any suggestions it would be appreciated.

 

laptop LCD not turning on..

Here is a tip is you cant fix it, make it noticeable that you broke it...step on it *Wink "Oh my gawd, did i step on your lil ol laptop, im terribly sorry" Then she has no choice but to buy a new one.