I have ordered and replaced a LED module for our screen and it is seems to have a different brightness and colour

LED screen modules are made in specific batches, these batches can never truly be re created post manufacturer in a different batch as subtle variances in the setup of the factory line (even ever so small) will create a noticeably different outcome.

It is more apt for Westan to arrange a repair of a module from the original batch, if this is not possible the via the use of the PRJ xxx (Project Number) Aurora Manufacturing can trace the serial / production specifications and manufacture as close to possible the original batch type. Aurora will also use a calibration tool to calibrate pixel by pixel to attain the best possible match.