LG G2 won't charge if on.

P.S:This happened after it fell down from aroind 1m TWICE in a row.

Hello, i have a problem with my brother's LG G2 , it won't charge while it is on, it's battery drains, so i turn it off.Then it won't turn on at all, not the logo, not telling the % of the batery, nothing, after it has been charging for around 4-5 hours, i plugg it off, and hold the button for around 5-8 sec or even more, and still doesn't turn on, after a couple of tries it turns on kinda randomly.If you need more info just ask.
Thanks.