Galaxy Diagnostics Screen Tool Fixer

If the hard reboot just brings you back to the same screen, you need to interrupt the boot sequence.

If your screen works but colors look "off," you can calibrate it without any fixer tool: galaxy diagnostics screen tool fixer

This is not a "repair," but it compensates for minor aging of the OLED panel. If the hard reboot just brings you back

If the screen is responsive but won't exit, the touch matrix might still work. This is not a "repair," but it compensates