Default [Q] different kind of bootloop?

hi i have a lg optimys f6 ms500,its bootlooped (soft bricked) but only when the screen sleeps...sounds weird to me maybe not you tho,basically,it works until the screen sleeps or turns off,then its sent into boot loop at which time i have to hard reset it,my phone does not have a method for entering recovery mode,if i hard reset it it boots up then turns on and i get home screen but if i dont turn off screen time out fast enough it boot loops idea is at least the screen turns on so it must be fixable,right? any ideas? please help