How do I fix my LG Optimus Fuel model LGL34C from an endless boot certification error (code1220)?

[AC Question]

I had the phone on its charger all night, as usual, and then this morning I turned off the phone, waited approx 30 seconds and pressed the power button to restart the phone. I do this every morning as the phone seems to function better if I reset it every morning. This morning, I believe, I accidentally pressed another button (volume of home) for just a moment as i pressed the power button (I don't know if this matters or not but added this info, just in case) Now when it come to the LG login screen it shows the Boot certification error in a small window box at the top of the screen. What can I do to fix it?

 

[Golfdriver97]

Welcome to the forums. Can the battery be pulled? If so, try that for about 10 minutes and try booting the device again.

 

[b 1]

im having the same problem with my phone, the code on my phone is reading 1100.
what is the solution?

 

[b 1]

LG login screen it shows the Boot certification error in a small window box at the top of the screen. What can I do to fix it? I cant use my phone, please help

 

[b 1]

im having the same problem with my phone, the code on my phone is reading 1100.
what is the solution?

 

[b 1]

LG login screen it shows the Boot certification error in a small window box at the top of the screen. What can I do to fix it? I cant use my phone, please help

 

[b 1]

cause:
boot certification verify

 

[Gaming8 TV]

I need help it keeps saying 1160 certification verify
secure booting error :'(

 

[Bonnie50]

I've got the same problem except my code varies from 1130-1200. How do I fix it?