Sharp AQUOS 40SA5200 TV that is experiencing several problems:

I am writing about a Sharp AQUOS 40SA5200 TV that is experiencing several problems:

1- The TV powers on by itself and switches to AV input with the volume set to 30.

2- The USB port only plays audio files and photos. Video files either do not play at all or play for a fraction of a second before the TV restarts. I have tested multiple video formats and codecs without success.

3- When connecting an Xbox via HDMI, I receive audio but no video.

4- Satellite channels from my receiver work perfectly via HDMI — the receiver displays all channels and plays video normally on other displays. Also, when I plug a USB flash drive into the receiver’s USB port, video playback works fine. This suggests the issue is specific to the TV’s USB and HDMI video handling

Troubleshooting steps I have already tried:

Attempted a power reset using the TV power button, but it had no effect.

I could not find the hidden/service menu to perform a factory reset.

I tried to access the TV service menu like this: first I unplugged the TV, then I held down the power button. While still holding it, I plugged the TV back in and kept holding the button until the indicator light started blinking (it blinked only green, not red). Then I pressed the power button four more times and held it on the fourth press until the Sharp logo appeared on the screen, then I released it. According to tutorials I watched on YouTube, the service menu should have appeared at this stage, but it didn’t. I tried many times and it made no difference.

Testing multiple USB drives and formatting to FAT32.

Testing different video formats (including MP4/H.264).

Connecting a working receiver and confirming that the receiver displays satellite channels.

Requested assistance:

Please advise whether there is an official firmware update for model 40SA5200 that may resolve these issues and provide the download link and installation instructions if available.

If firmware update is not applicable or does not resolve the problems, please advise on recommended service/repair options. The symptoms suggest a possible main board or power/factory firmware fault.

TV details:

Model: AQUOS 40SA5200