Hi please need help i start in cool and run great when i turn off then no start again is like the batt is no good but the batt is good the charging sistem is good i check the positive cable the ground and solenoid and is good please let me know if that hapen before and how can fix thanks

Hi please need help i start in cool and run great when i turn off then no start again is like the batt is no good but the batt is good the charging sistem is good i check the positive cable the ground and solenoid and is good please let me know if that hapen before and how can fix thanks