Sorry for the inconvenience. Seems like phone software may have been corrupted and doing a reboot & not going to the main display screen. You have to perform a factory reset on the device to get the phone back to the main display screen. You’ll not able to recover any data once the reset has been performed.
Reset LG Viper using hard keys
(1).Turn the phone power off
(2). Press and hold the following keys for over 10 seconds Volume down Button + Power/Lock Button.
(3). When the power turns on, release these keys.
Hope this helps