Solved! Accidentally unplugged it without battery

I have had an Alienware 14 laptop for 3 years now. For the past year, because the battery died due to some other reason, I'd taken it out and have been using my laptop ever since by connecting it directly to electricity with its power cord.

Today while my laptop was on, the cord got accidentally unplugged and obviously it shut off. But after reconnecting the cord, it didn't turn back on anymore. The cord itself is similar to other dell products, it has a stripe around it that lights up in blue whenever connected to a power supply. But that was off after the incident. I disconnected the cord from my laptop, unplugged it from electricity and plugged it back again, its lights came back, but the moment I connected it to the laptop, they went dark while the laptop still didn't react at all when I hit the power button.

I tried once holding the power button while my laptop wasn't connected to electiricity. And plugging it again but to no avail

Please help me, what's the problem? Has my mother board burned out?

Ps. I tried with a different charger, no use, still my laptop doesn't turn on

I've been told my mother board must be broke since there was no battery inside to take the hit instead, is there a connection to it?