Hello. I own Dell Vostro 5568. Earlier today i was surfing the internet and my laptop just shut down instantly just like that despite the fact that i had completed charging it like 30 minutes before (i had like 85% left). Seemed weird and i couldnt turn it back on. Then i connected the charger and i could turn it on. I just let it go. An hour later the same thing happened but now i cant turn it back on even with charger plugged in. Even holding the power button does not help. Please what can i do?