Hi Guys.New to this forum.Can anyone advise why only 3 of the 4 dash heater vent 'rollers' illuminate? The car in question is a 2000 1.8SE and I'm not sure if it's a bulb or a sealed LED unit.It is the drivers side roller that fails to illuminate.I have tried to gently pry out the vent to look but it's so tightly fitted it feels as though any excessive force will break it.Any advice greatly appreciated.