Hello all, I have just changed the battery on a cheap chronograph, it was working fine before, put the new battery in and nothing, put the old one back in and still nothing. I've read that on some you need to cross certain points to get them going again. Now I've change batteries before but I think this is the 1st time I've done it on a chronograph. The only marking on it is SL70 above the words No Jewels, like I said cheap! It's my youngest lads watch and he loves it. Any ideas?   Sent