If your computer does not power on with the AC adapter connected, this would indicate a problem with the AC adapter, or with the DC jack on the computer itself. If you are sure the AC adapter is functioning properly, then the problem would be with the DC jack, and the computer would require service. If your computer requires service, please contact Acer Technical support to set up repair.
Please join me in congratulating IronFly who is the first Acer Community Member to achieve the rank of ACE Pathfinder. IronFly has shown a consistent willingness to help others and has worked hard to earn this new Rank. Congrats and Thank You IronFly.