These files (often named MstarUpgrade.bin or similar) are typically shared on technical repair sites. Note that using the wrong firmware can permanently "brick" your device.
Specific firmware files like "LEO40FSAIN FHD Firmware part01.rar" are usually multi-part archives uploaded by third-party technicians to platforms like: Download ONIDA LEO40FSAIN FHD Firmware part01 rar
Sites dedicated to LED TV software often host these files for professional use. Why Update Your Firmware? These files (often named MstarUpgrade
If your TV is stuck on the logo ("boot loop"), you may need a manual flash file. Download ONIDA LEO40FSAIN FHD Firmware part01 rar