If you upgraded to a completely new version of Android, navigate to Settings > Device Preferences > Reset > Factory Reset . This clears out legacy system cache files that could cause performance degradation or app crashes.
Option A: Go to Settings > About > System Update and select "USB Update" if available.
Insert the USB drive, then on the TV (not the remote). While holding the button, plug the power back in .
If the TV continuously restarts after a manual flash, perform a hard reset: Unplug the TV from power for 5 minutes.
If you cannot locate official firmware, reply with your and region , and I can help narrow down the correct firmware source. Tcl 55c2us Firmware Update
Copy the downloaded firmware file directly to the of the USB drive. Do not place it inside any folders.
The OTA method is the easiest and safest way to update your TCL 55C2US, as the TV handles the downloading and installation automatically. Turn on your TCL 55C2US TV.
Updating firmware can sometimes run into roadblocks. Here is how to handle the most frequent issues: "No Update Found" Error
: Ensure the TV is connected to a stable Wi-Fi or Ethernet network. If you upgraded to a completely new version
TCL 55C2US firmware update is essential for maintaining the performance of this Android-powered 4K HDR TV
Scroll down and choose (or System , depending on your baseline layout). Click on About . Select System Update . Choose Network Update from the dialog options.
Major software updates sometimes bring a cleaner, faster user interface or an upgraded version of the Android TV operating system. Pre-Update Checklist
Updates often include tweaks to HDR handling, local dimming algorithms, and sound synchronization. Insert the USB drive, then on the TV (not the remote)
Insert the USB drive into the USB 2.0 slot on the back of the TV.
Insert the USB drive containing the firmware file into the TV's USB slot.
Press and located on the back or bottom of the TV panel (not the remote control).