Before updating the firmware, you should know about the version of the firmware now running with your TV. Without knowing it, and updating the firmware; might cause the set to get irresponsive to any external commands. So beware before updating. After make sure about the firmware now running, check the site linked here to get latest firmware update to your TV. It will be best to contact any service technician in this case, I suggests.
Electro help
Olevia Driver Firmware Manual
There were no options to download the firmware for my Olevia 537H TV.
The problem I am having with the TV is that when I am watching any show on NBC, when the music plays it is so much louder than the voices of the actors, that you cannot understand what they are saying. Maybe you can help with the issue instead. Maybe firmware update will not fix problem.
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