Solution

Step 1: Obtain the Vacuum Suction Tool

Step 2: Remove the target LED module. Note that the whole display will have the same batch number, so it may not matter which LED module you remove.

Step 3: Refer to the following location for the batch number on the underside of the LED module:

Step 4: The 12-character alphanumeric identifier will be the batch number or color code. 

The batch number or color code in this example is W8D202400001

Watch for Instructional Video:  "YouTube How-to | How to find LED Module batch number or color code"