Lava A77 Stuck at logo solved by Format-

[AvatorPro]

Read info-

Operation : Read Info
   Boot: SC9832 EMMC
   Hint: Power off phone, hold bootkey, Insert usb cable
   Scanning usb device...
   Phone found : SCI USB2Serial (COM87)
   A thread is created to handle new usb connection, pls wait...
   Bootstrap: SPRD3
   Connected...sending boot...
   FDL1 test...OK
   Sending FDL2...
   FDL2 test...OK
   Checking H/W report info...
   Read info is done.
  
   Reading phone info...
   Hardware        : SP9832A-2_V1.1.0(4M)
   brand           : Lava
   Model           : A77
   Project Version : A77-user 6.0 MRA58K 105 release-keys
   Software Vesion : Lava_A77_S107_20170614
   Android Version : 6.0
   CPU Architecture: armeabi-v7a
   Locale Region   : US
   Language        : en
   Build Date time : 26-08-2017 12:23:06
   Userdata State : Normal
   
   Operation Done: 00:00:19
   Avator Pro SW 2.2

Format-

Operation : Format / Reset
   Boot: SC9832 EMMC
   Hint: Power off phone, hold bootkey, Insert usb cable
   Scanning usb device...
   Phone found : SCI USB2Serial (COM87)
   A thread is created to handle new usb connection, pls wait...
   Bootstrap: SPRD3
   Connected...sending boot...
   FDL1 test...OK
   Sending FDL2...
   FDL2 test...OK
   Checking H/W report info...
   Read info is done.
   Erasing userdata partiton, it will take a minute or so, pls wait...
   Erase has been completed.
   
   Auto formatting...
   Format Done.
   
   Operation Done: 00:00:36
    Avator Pro SW 2.2

Br.