My topbox began to flash 9.99ohms a while ago but I would simply unscrew the tank a little and it would work again. I used it with no problem all last week and then Friday night it wouldn't fire up at all, it just kept flashing the 9.99. I've done some research and tried many of the things I've found. Opened up the mod to see if the wires were messed up, made sure the 510 pin wasn't stuck down, changed coils and cleaned the base of the tank to no avail. Anyone have some advice for a fix? is taking it to a shop my best option?