Problem with my charger..

I'm facing issues with my lenovo y 700. The charger iis not working but when I adjust the charging pin sideways it starts charging.But today even thats not happening.I contacted lenovo service sentre guys.They informed me that ADL135 charger(comes with my system) is not available and they are asking me to buy a 90 w charger.so is there going to be any issue with that?