If the TV won't turn on at all, you likely need a (.bin or .hex) rather than a standard firmware update (.zip or .exe). These are usually hosted on electronics repair forums:
Are you dealing with a specific error, such as a or a blank screen ? Support - Sharp Global Download FLASH DUMP SHARP 32LE244E rar
Recovering a TV that is stuck on a standby light or "boot looping". If the TV won't turn on at all, you likely need a (
You can search for the specific model number on the Sharp Global Support Service Manual: A detailed service manual for the LC-32LE244E Download FLASH DUMP SHARP 32LE244E rar
Fixing minor bugs or updating features while the TV is functional. CH341A Programmer (or similar)