Default [Q] MY LG G2 D802 won't turn on

please help me....I've lg g2 d802 which was root since I buy it. today I want to install a 'font installer 'from google play store which require rooted phone to install it.after I install it,it reboot and then only blank screen with lg logo on it .i've do a hard reset and screen said' factory setting processed' but nothing happen only lg logo appear on screen with blinking led.please help me what to do....