Xrocker chair

Geraintt

Hi everyone. My son had a xbox one s brand new for Xmas and he then wanted a gaming chair. He bought a second hand chair, which didn't come with power supply as the guy had apparently lost it. I went to argos and bought a plug adapter that can supply the required 9v but only 1 amp as opposed to 2 amp which apparently the chair needs to run. I can get the chair Bluetooth light to come on when powered up but nothing else. Also the blue light is continuously on and not flashing. Is this typical by using a universal power supply?? Any help would be great thanks.