My phone won't turn on, after Odin

Samsung j1 was stuck in loop. When I went to recovery mode to wipe cache I saw it had E: can not mount cache error… was advised to reinstall firmware using Odin. I did that and Odin said Pass but the phone never rebooted again.. since then it's not showing that's it's charging when connected to charger, even the charging led is not showing. It won't power on. I took out the battery, dis the power+vol up & down combo, reinserted battery and still nothing. When connected to laptop, the laptop says unknown device but phone is not displaying on laptop. Can anyone help