Laptop not starting

[Prabhat1658]

I have dell insipron laptop of 5000 series.
Intel core i5 5th generation.
Laptop was automatically turned off when it was on and plugged in charging battery was 100% but now when I try to reopen nothing happens.
When I plug in power adapter blinking white flash appears on indicator.
I have tried by removing the battery and reinstalling it and also removing battery disconnect ac source then pressing power button for 30 sec approx then reinstalling battery and tried again but again same happens.
Please let me know why this happens.

 

[webworkings]

Have you tried turning it on with the adapter only attached, no battery in?

 

[Prabhat1658]

I have tried this but nothing happen.
Actually when my laptop was working correctly then also when I removed battery and plug in charger my laptop won't turn on.

 

[webworkings]

Ah, so you have one of those (doesn't work without battery in). Do you get any signs of life at all?

 

[Prabhat1658]

No sign but once it was power on when I'd left for 3 days untouched but with in a moment it turned off..

 

[webworkings]

Have you tried using a different charger cord and/or different battery?