^^^ This technique will simply add more water to the board if there is a leak.
Check for sponginess & weigh it against it's specs.
If you want to find if you have any fractures, put a small amount of soapy water over the suspect area & (this obviously only works if there is a vent) add a 'small' amount of positive air via the vent hole to the board & hold your finger over the hole. From lack of equipment, I simply drilled a hole in an eraser & used a ball/bike pump - should only need a couple of pumps. If there's a leak it should start to bubble from the crack within 20-30secs...don't do what I did once & give it too many pumps...this will de-lam the board!
