I'm able to flash the ROM with the original copy of firmware in Lenovo TB-7504X but not able to do it with any other ROM and even not able to change the logo.bin file, i also changed the CHECKSUM accordingly but it is failing every time if i make changes.
fastboot mode is not supported so can't change ROM with adb, tool I'm using is RSA ( Rescue and Smart Assistant ).
also tried to change the firmware with SP_Flash_Tool_V5 but didn't work.
what do i need to do if i want to change logo or anything else in firmware ?
chip-set: MT6737M