電腦之難題.....(有關寛頻連線)

唔知點解,,我連線果陣要連好奈(我係用網上行的,用狙都成年喇)之前初初用果陣好快,完全唔駛等ga!!!一開機就可以即刻連到(即係果個寫住LINE ge綠色燈停左就連得)但係,,,個問題喺之前發生左......一開機果個綠色燈係咁閃係咁閃,好奈都未停,咁即係連唔到啦,要等佢停又要等超奈,時快時慢咁啦,,,都唔知發生咩事??????有咩方法可以解決呀??????????請幫個忙吧,,,感激不盡!!!!!!!!!!!!!!!!!!!!!!!!!!