ligando o dell inspriron aparece a mensagem na tela preta

Qdo ligo meu Dell Inpiron aparece a seguinte mens:

the ac power adpter wattage and type cannot be determined. the battery may not change the system will adjust the performace to mach the power avaliable.  please connect a dell 65 wac adapter or greater for best system performance. to resolve this issue, try reseat the power adapter.  

O que é isso?