Double-check that the USB drive is formatted to FAT32. Try using a smaller capacity drive (16GB or lower) or a different USB port on the TV.

The USB drive is formatted incorrectly or the file is buried in a subfolder.

Press and hold the Power button on the TV bezel (not the remote) while plugging the power cord back in. Release it when the LED indicator blinks or the update screen appears.

Before we get into the "how-to," it's helpful to understand why you should keep your TV updated. These updates are designed to:

Complete Guide to Sharp AQUOS TV Software Updates: Free Downloads and Optimization

If your TV cannot connect to Wi-Fi, or if the OTA update fails, you can download the official firmware for free using a computer and a USB flash drive. Step 1: Format Your USB Drive

This is the easiest method if your TV is connected to Wi-Fi or Ethernet.