Note: Some patches also remove the "Press Power key to continue" VaultKeeper step.
Do not proceed unless you have the following. A mistake here can hard-brick your SM-A127F. a127f bootloader logo fix
The cleanest "fix" is actually a custom ROM. Many A127F custom kernels (like Optimus Drunk) now include a built-in silent boot feature that bypasses the LK wait time without modifying the LK partition itself. Flash a GSI (Generic System Image) with a custom vendor, and you'll never see the yellow screen again. Note: Some patches also remove the "Press Power
Easier option: Download a pre-modified param_A127F_no_warning.tar from a trusted XDA thread. a127f bootloader logo fix