I do not know this type of tv, but here are some general clues. Check if you can set from remote control an input like "RGB", similar with "AV" or "S-Video". If you can set RGB, then your TV knows it. Check the connectors in the back, the euroscart have dedicated input RGB pins, but they are not connected in all TV sets. Put tv in av mode and then touch with a wire a dedicated color input, to induce some noise in the line. Check the screen to see if noise is displayed. If not, probably you won't be able to display RGB signals. This checking will work only if the TV does not blank the screen when the syncro signals are missing.
/pisoiu