Have you already tried resetting the monitor? You may be able to find this settings under the support or picture area.
Let me know if this helps!
Was given to us. Trying to connect tv to dish network. Have sound. Screen cycles through colors (a single color at a time) red, blue, black, green, white. We did not receive the remote. Anyone know what this means? And is it just me? I am a newbie. Thank you!!!