I have a 1999 Yamaha Waverunner XL1200. We took it out in May for the first run of the season and everything was great. Three weeks later it didn't have enough juice to crank on the ramp. Tried again last week after recharging the battery and nothing happened. The battery only showed 3/4 charge so I thought the battery might be the culprit. Bought a new one, charged it up according to the directions, hooked it up and still got nothing. It won't make a sound. No display. Nothing. I know it has proper power, but there's ZERO response on the display or from the engine. This is my third year with this thing and the first time I've run up against this problem. Any advice is GREATLY appreciated. I have two little boys desperate to get out on the lake. Thanks.