I installed ROM Toolbox Pro. I used the Root Browser in it to change the boot and shut down animations. It was okay, no problems. I also changed the font several times. I also managed the system audio files using the Root Browser and no problems. I tried changing the font again and then when I tried rebooting, it won't pass through the boot animation anymore. I removed the battery and the SD card and then put it back after 30 minutes but still the same. I have CWM recovery installed but unfortunately, I cannot access it. I am planning to flash the ROM but how will I do that if I cannot even access the CWM recovery? How can I fix the boot loop issue without flashing the ROM. I have a backup of the stock ROM and a custom Samsung Galaxy S4 ROM. Flashing the ROM will be my last resort. I need your inputs guys. Thanks in advance!