Why won't my alienware laptop charge?

Everytime i've asked a question about my alienware more than half of the answers are "alienwares suck" Please don't say that because it get really annoying. Anyways. I was just playing minecraft with my computer charget plugged in and my screen suddenly dimmed down. I checked my charger and the little blue light that says it's charging wasn't on. I tried unplugging and repluging it in. Also, I moves the cord to about 4 different outlets. No luck. I have one of those extension things where you can plug several cords into it. I tried about every one of those. Tried unplugging the extension thing and plugging it back in, turned it on and off and still no luck. What's the problem? Please try to answer fast because my computer dies kind of quickly and I don't want to have to turn my brightness very low and such. By quickly I mean in the base hour or two. Thanks.

Added (1). My dad just had to turn off the power for a while and i didn't know. No problem here!

Because

You may need to get the the dc jack fixed
on the motherboard

Hi I'm not going to say Alienwares suck because I have no experience to say that they do but from the website, they look quite good. Now back to your question, I have had charging problems with older computers. When you say the charging light wasn't on, then that probably means you need a new charger. If you are still under warranty then contact DELL (because dell own Alienware) and they should fix your charger for free, but if your warranty has run out then you might have to buy a new charger or take the current charger to your local computer store and pay them to fix it. Hope this helps

According to your info, either the charger is gone or the extension isn't working. Try to plug in directly to the wall outlet and see that helps. If so, the extension is gone. Hope that helps.