Clean the screen and position the estimating gadget: LCD boards don’t draw in dust the way electrostatically-charged CRTs did, yet it actually settles there, and fingerprints won’t help your alignment endeavors by the same token.
Ensure that in the event that you have a colorimeter with suckers for joining to glass CRTs that you don’t squeeze it against a LCD board as it could pull the front layer off when you eliminate it. All new colorimeters for use with LCD shows transport with stabilizer game plans that permit the instrument to lean against the front board.