Postagem original de: Buddhika Mahesh ,
Try to reset SMC https://support.apple.com/en-us/HT201295 but i feel explained fault coming from Power management module or power adapter. modern power supplies having better short circuit protection system. LED blinking means there should be sort circuit fault or your power adapter not able to provide enough power to boot up the system. i suggest you to start troubleshooting from power input.