I have a 7t34 flightmaster chronograph that I picked up from eBay a long while back it wasn't working so I put in a new battery but the only thing that worked was the chrono so I put it away for a while. I found a reset tutorial somewhere but that didn't seem to work so put it away again, last night I gave it a try again with a new battery now everything works as it should except the chrono wont work. Does anyone have any idea on what I can try to get this watch fully functional?