Windows 10: My laptop failed to start, can't even turn on

I have a Dell laptop. Earlier today I clicked on Advanced Startup => Restart. My laptop then stuck in a black loading screen with a spinning cursor with no animation, I can't move the cursor as well. After 30 minutes I decided to hard reboot and after that it seemed the laptop had entered a kind of "coma" status. I've tried to turn it on but nothing happened, the screen isn't showing anything except when I hold D + Power for display test. The front LED light maybe the only thing that works in this computer. What should I do?

:)

 

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.

 

Best laptop under $800??

Well the last one I suggested seems to be the best for 650$

EDIT: to facilitate your search...

Laptop GFX benchmark list

Laptop CPU Benchmark list

 

Can't upgrade laptop to Windows 10

Thanks for the suggestion.

I tried Windows Defender and discovered it was not turned on and when I tried to turn it on it would quickly turn itself off again. I used another anti-virus program to check out the laptop but it found no problem. Obviously this laptop has some problems.

My next step is to put the original drive back into the machine and try the Windows 10 upgrade from that and if that also fails do a restore of this laptop to the original Windows 7.