If it isn't turning over there might be an issue with the starter. Many starters on the 708 engine are delivered with faulty electric starters.
Although this is true and something that should be checked,
@Aanakwad did say in the original post that the display flashed a Er-1. I don’t recall reading anyone with a failed starter having that error code flash on their display. However, maybe this one is the exception.
Aanakwad, go to 501parts.com/downloads, scroll to the bottom and click on the appropriate Service Manual. There you can find troubleshooting information in the last section.
Er-1 ECU (Engine Control Unit) internal malfunction (output signal error): signals cannot be trans- mitted between the ECU and the multi-function meter.
Does your battery charger specifically test load? If not, take the battery to an auto-parts store and have it load tested. Charging it or checking voltage does not tell you if the battery is holding Amps, load testing is the only true measure of that. Also, clean all battery/starter/chassis ground terminals and reconnect.