It´s very easy to fix this issue related before. Just follow these instructions:
-Unplug from power supply the MCP.
-Open the upper lid of MCP.
-Locate the failing display.
-Press slightly and step by step the display towards its base. If any instrument is needed, use one thin, soft and plane and be careful not to scratch the display´s surface.
-Plug in power again.
-Test everything is ok before closing the lid.
P.S: The related steps below can be applied to any 7-segment display.