Alienware X17 R1 Ac Power & Battery Problem!

Hello Guys i have Alienware x17 R1, it's working well but 2 days ago i when i power on the laptop i get a white bios setup page saying that the Ac adabter not detected or have problem, after i  put it on again or scrolling it the ac power charger begin charging some time the ACC get me a notification saying that the ac power not recconisable,i made the support assist check, and on the hardware test it get warning, so i want to know if this is a battery problem or ac power, also many games are stuttering and the lap performance begin to be slow and many frames drop. :(