OnePlus 3 not responding

I recently replaced my OP3 battery after facing battery draining issues. Since then the phone has not turned on. The power button+volume down is also not working. But when I try switching it on with the charger plugged in, the OnePlus logo splash screen appears for a while and it switches off again. I canโ€™t figure out what the problem really is. Need help ASAP.

์ด ์งˆ๋ฌธ์— ๋‹ตํ•˜๊ธฐ ์ €๋„ ๊ฐ™์€ ๋ฌธ์ œ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค

์ข‹์€ ์งˆ๋ฌธ์ž…๋‹ˆ๊นŒ?

์ ์ˆ˜ 0

๋Œ“๊ธ€ 1๊ฐœ:

Look carefully if you forgot to connect some cables or un-plug and re-plug connectors inside the phone.

์˜ ๊ณต์œ 

๋Œ“๊ธ€ ๋‹ฌ๊ธฐ