LG G3 Wont Charge/ turns off after 10 seconds of turning on "Sometimes"

I've had my LG G3 V985 for almost over a year now. I was stuck on android 5.1 for a good 8 months and it was horrible and laggy. I flashed, lineage 14.2 on to the G3 and all went well, it was faster and not laggy, however 1 week after flashing my phone died at 50% with no indication it was going to die, and wont accept a charge (No LED). I tried taking my battery out and holding power for ~15 seconds which works, occasionally but only gets me 10 seconds of power until it turns off. I bought a new battery and things have not yet changed. The phones seems to turn on at random times when i hold the power button, once I do it ~2 times a day it wont turn on for 10 seconds all day. The few times i have managed to get it into recovery mode, the volume buttons sometimes don't work to select the options and it just stays on the top option, then powers off. I'm really stumped at this point and any feedback would be greatly appreciated