Boot loop on stock ROM phone

[2303]

My Lenovo A6000 Plus is getting stuck on boot loop and showing other weird behaviors. I factory reset it and cleaned its cache from the recovery screen but that didn't solve the problem. Is there possibility that this is a software problem which would be solved if i flash stock ROM / kernel? If yes then how to do that? The instructions i found online for flashing ROMs on my phone, i found them incomplete for me.