Although your board may look and feel like it is full it may only be filled to about 5 psi. The Typhoon 3 stage hand pump gauge will not register a reading until it reaches at least 9 psi. This usually happens in stage 2 or 3. Look at the gauge while you are pumping because once you stop pumping the gauge will not show the pressure when it is sitting still. So even though you think your board is full, Keep Pumping. The pressure will show up soon enough.