Onn 26" TFT-LCD (Model TL2638-TP), no remote, how to unlock side buttons?

Somehow ended up locked, language in French but says Verrouilage which translates to Locked in English. Anyone have any idea how to unlock it. Tried all sorts of button combinations and holding the buttons.

Any help would be hugely appreciated, understand it will be hard because it isn't some generic TV Brand.