A common repository for tested LED TV software.
Place the .bin file in the root directory (not inside a folder). Download Micromax L40CD500 Software part1 rar
Often hosts multi-part RAR files for Micromax models. Soft4Led : A global database for TV board firmware. Common Installation Steps A common repository for tested LED TV software
Since direct links often break, search these reputable technician platforms for "L40CD500 firmware": Download Micromax L40CD500 Software part1 rar
Note the model number on the sticker of the LCD/LED panel itself.
Plug the USB into the TV while it's off, then hold the power button or plug it in to trigger the auto-update.