Why when my phone comes on it has 3 lines of numbers and letters.

[AC Question]

I tried charging my phone , well it showed the battery with a half circle on the screen. Then 3 sets of numbers and letters appeared in the top left corner

-854890 fastboot_init()
-854990 usb init ept @ oxffe6000
-855010 udc_start()

What does this mean? It has the lg logo on the screen as well I can't get it to do anything. Please help

 

[belodion]

Do you have Developer Options enabled, and switched on? https://forums.androidcentral.com/showthread.php?t=409154