Volume increases till maximum volume is reached

My JVC 36" has an issue in which when it is initially turned on the volume continually increases until the maximum volume is reached. If I depress the volume decrease button it will decrease until I release the volume decrease button. At which time it begins increasing again. In short it acts as though the increase volume is stuck. But it is not depressed an feels as though it is not stuck. I have also removed all remotes from the vacinity to ensure it is not a remote control issue. If no one knows of a solution is there a potential work around where I might simply mute the tv and use an alternate source of volume?

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